NENRENT S570+ Smallest Mini Invisible Wireless Earbuds with Mic - Bluetooth 5.0 Headphones for iPhone Android Smartphones - Hands-Free Calling, Clear Sound - Perfect for Workouts, Commuting & Office Use (Black)

(Updated: 1 year later review, please see below at the bottom under update review)Initial Review:This review is based on a small Bluetooth earbud that cost $20, so if you have exceptionally high expectation please reset your expectation and set it to a manageable realistic level. This is a long and fairly thorough review. If you don’t want the details and just the gist of it read the summary. Or check out the Content below summary to read whichever section you want more details about. If this review was helpful to you please click yes. Thank you for reading my review.Summary (to the point): The Nenrent S570 is very lite, about the size of my pinky and very comfortable to wear for long durations. The manual has inaccuracies, but its readability is manageable for me to operate the earbud. The sound quality is quite good for both music, podcast and calls (had no issue at all). If you are looking for a small lite weight earbud that has fairly good sound clarity and last up to 6 hours then this may be the right one for you (it was for me).Content: (skip to any part you want to read)1. First Impression (item un-packaging, Looks, quality feel, pictures)2. Manual (readability, common sense, language, mistakes, warranty)3. Product Functionality (does it work as it’s stated, thorough test in many parts)4. My personal opinion as a buyer (is it worth it for the price)1. First ImpressionThe Nenrent earbud comes in a fist size black box that slides open from pulling on a little black ribbon tab, similar to opening a drawer. Inside of the box is a half fist size red zipper type sturdy hard shell case with a carbon fiber design look to it. Inside that we have an earbud, 2 bud tips, USB charging cord, aluminum carabiner key chain clip hook, and a Nenrent S570 manual. I was pleasantly surprise that it came with a nice looking hard shell case and an aluminum carabiner key chain clip hook. Please take a look at the illustrations I have uploaded which includes everything I have mention including size measurements. One minor issue I see for others is that the two bud tips are the same size instead of a variety of sizes which may allow for a better fit option for some buyers, but for me and my small ears it fits very well. The earbud is extremely light and has a simple design and color that doesn’t stand out. The earbud does not look too sturdy with its plastic like shell and may not be able to handle any trauma; so please be careful not to drop it on hard ground. Everything unpacked and looks really nice; got a little bit more than I expected for the price, but we will see how it handles in the real world test.2. ManualThis manual is one long folded strip of paper about 16” across and 3” height (see illustrations) with typed instruction, pictures and a chart on front and back of strip of paper. The manual is written in something similar to “Times New Roman” size 6 font; so quite small and may need magnifying glass to better read the instructions. The manual does not indicate/itemize what you are supposed to receive in the package.The instructions and information provided on the manual are not perfect, but not too difficult to understand. It would be consider quite good compare to some really poor written instructions I have seen. Since this earbud is not a complex product the instruction even though has a fair number of mistakes was not too difficult to get it in working order. One issue I found quite fast was the instruction says when charging the earbuds the indicator light is blue during the process and the light will go out when charge is complete. From my charging process the light was red and turned blue when fully charged. I let it charge on blue a few more minutes and stopped it because the manual does state a warning not to charge it too long or it may affect the headset (earbuds) or the battery life. Update: the manual doesn’t seem to reveal that any red LED exists on the earbud (no mention of red LED at all in the manual).Warranty: 1 year, but do not see any contact information. Also if you plan to give this as a gift, the person will not be able to use the warranty; so if warranty needs to be used the original buyer may try the warranty service.3. Product FunctionalityCharging Battery: A red LED light comes on as soon as I connect the earbud to my laptop USB 2.0 with the provided USB charging cable. The initial charge completed in 22 minutes out of the box. The charging time stated in the manual is between 20 minutes to 2.5 hours (other location states 20 minutes to 2 hours on the same manual). After draining the battery completely it took me 1 hour 45 minutes to complete a full charge.Pairing via Bluetooth: The pairing via Bluetooth was simple and easy like the instruction states. Hold earbud MTB (multi-functional button) for about 5 second or until it flickers blue and red. Make sure your Bluetooth is on in your phone and select “NENRENT S570” to pair it to your device.Pairing signal Distance: I walked through 3 rooms measuring over 35 feet while still being connected. So the signal distance exceeds the distance of 10 meters as stated in the manual, which is definitely a plus here.Fit of Earbud in Ear:A. This earbud (without bud tip) while bare fits very comfortably in my ears. Mind you that I consider my ears to be fairly small and would usually use the smallest or near smallest bud tips with other headphone. This earbud is very small fitting and lite that I didn’t even notice I was wearing it at times. I wore this earbud all day listening to music without any discomfort. If you have concerns regarding the comfortability from wearing this earbud for an extended period of time I am here to reassure you that you will not be negatively affected by this earbud (I switch between ears).B. The earbud (with bud tip) fit well and increase the sound I hear with the same volume level. With the bud tip on it allows the earbud to fit more snugly in my ear. It fits more securely, so it may be better for active use like sports. Besides having a snugger fit I had to lower the volume by one to have it at the same sound level as before since the bud tip increase the sound level.Earbud Sound Quality: (To encompassing both high to low frequencies. I’ll test the earbud with classical music, Jazz, classic rock and Podcasts)A. Volume: The volume of music/sound is determined by your phone or whatever you’re connected with. The earbud volume/sound level is very good; I had no problem listening to music at the lowest volume setting. You will have no problem hearing things with this earbud. Remember to restrict the volume from going too high or it may damage your ears. The different type of music and podcasts I listen to were fine, not great, but passable. One thing I need to emphasis is that you are listening with one ear and that to me lessens the overall intensity and atmosphere that can be built up while listening to classical or other music.B. Sound Clarity:i. Music App: The sound is clear and pretty good (don’t forget this is a $20 earbud, not your $150-300 headphones) overall. With the variety of music I listen to (high and low frequency) ever note was heard, every pitch on point. This earbud took everything without complaint, no squeaks or static response from my bombardment of music. Again please bear in mind that this is all through one ear so the experience cannot be compared to dual ear devices. With music there are times I just like it in the background as pleasant noise and other times I want to fall into the sound of music and dive into its depth without a care around me. You cannot dive with these earbud, but background music is good and as a one piece earbud this is what I am looking for.ii. Phone Call: The phone call quality was perfect with no issues at all. The earbud clarity was crisp and clear and the other person on the other end of the line said the same thing, that everything was good and clear.iii. Podcasts: Just right for podcasts. Unlike music, podcasts does not demand as much attention to sound detail, but clarity. For me I can multitask while listening to my podcast through one ear and I think it’s better for me to do so with this earbud than using a dual ear device. Why you ask? Well for me having one ear free allows for better awareness around me and I am able to put more into what I am doing (multitasking).Earbud Battery Life:A. Music: This test was in a quiet office environment using my Samsung Galaxy phone to play music so the volume was set to a low volume of 2-4 (quite loud actually). The good thing is that the music sounds good and I am aware of my environment and able to hear what is around me. I never went beyond volume 7 on my phone (while using headphones or earbuds) but I think it goes up to at least 12, so 2-4 is about 20-30% volume level on my phone and I kept my phone within 3 feet from me for this test. The manual states 6 hours battery life at about 60% volume while listening to music. The earbud lasted 6 hours and 5 minutes before a vebal notice of “Battery Low” spoken by a female British voice. When that notice comes it will continue every few seconds so after three notice of battery low I shutdown the earbud. Battery life is fairly accurate; even though the volume was less than 60%.B. Phone talking time: Well, what can I say I don’t work as an operator so I can’t really test the on call battery life duration of 6-8 hours. So assuming calling time consume less power than music, it should last at least 6 hours with a mix of music and call.Multifunction Button: Personally tested.A. Bluetooth Pairing: hold for 5 second until blinking red/blue then pair to phone; no problem.B. Power On: Works as stated, 3 second hold and a verbal female announcement “Power On”.C. Power Off: Works as stated, 3 second hold and a verbal female announcement “Power Off”.D. Pause/play: tested and works well with music apps.E. Pick up phone call: no issueF. Put call on Hold (hold 2 second): works wellG. Hang up call: works well4. My Personal Opinion as a BuyerI think the Nenrent S570 is not the perfect product, but for the price it is outstanding. I was shopping for something very light weight without wires hanging around and not obtrusive while having fair quality sounds that last a few hours. The Nenrent S570 is the size of my pinky tip that provides 6 hours of playtime with clear quality sound. It is faultless for what I am looking for and for the price points what more can I ask for. It would be even better if it was water proof or at least resistance, but that is not a deal breaker for me. But for $20 it doesn’t hurt my pocket and I can allocate the money I save here to buy a water proof/resistance earbuds or headphone for active sports. My opinion and final verdict as a buyer is that the Nenrent S570 is a great buy for my purpose and price point. I hope my review of this product was of help to you, if so please click yes. By clicking yes more people will be able to see my review and hopefully it will be of help to them. Thank you for reading my review.UPDATE review 2/07/2019 (note I bought this in December of 2017)Hello everyone, it has been a little over a year since my purchase of Nenrent S570 Bluetooth earbud and initial review (wanted to update on my previous review but cannot find it on Amazon so I reposted it now with this update) and now I would like to take this moment to tell everyone what I think of it since then.I use this little fella more and more compared to my other wired headphones, earphones, wireless/ Bluetooth sports ear buds because of how lightweight and comfortable it feels wearing it. When impression when using the S570 for walking and jogging felt so natural in my ear like I wasn’t even wearing it at all. My other wired and bluetooth headphones and earbuds will often bounce around and pull on my ears a bit. After I tried the S570 I realize the big difference. For me having one earbud that fits comfortable while listening to music or other audio play works well for me.As of today the Nenrent S570 still holds its charge well and works like the first day I bought it (maybe the charge may hold a little less, but that is to be expected). These may not have the best audio sound quality if that is what you are looking for, but for me the tradeoff of having it so lightweight portable and comfortable does it for me.PS: For those that likes listening to music while walking or jogging in the city this earbud may work for you because you can still listen to music and have one ear free and alert to hear any warning around your environment for your safety (too fully immerse in music may cause accidents outside, expecially in high traffic areas).My opinion and final verdict as a buyer is that the Nenrent S570 is a great buy for my purpose and price point. I hope my review of this product was of help to you, if so please click yes. By clicking yes more people will be able to see my review and hopefully it will be of help to them. Thank you for reading my review.This is the first time that I have ever ordered or even used a Bluetooth earphone, so I wasn't really sure what to expect in terms of sound quality, battery life, and wearing comfort.Well, this is one of those few times when all those aspects, plus some others, exceeded expectations.First, I'm really happy with the sound quality, with sound every bit as good what I would get with any similarly sized wired mono earphone.I bought this primarily to listen to spoken word podcasts, so the fact that I'm listening only in mono is not a negative because I wanted to keep my other ear open to be able to hear around me anyway.I'm also really surprised by how long battery life is, which easily outlasts over five hours at just over half volume level daily.In fact, I haven't yet been able to see whether it really lasts the six hours stated as its approximate run time because I just don't normally listen to podcasts quite that long at a time.Wearing comfort is also at least as good as with wired earbud type earphones, and there is the option to wear this either with or without the silicone ear cushion depending on your preference.I normally wear this while walking a considerable amount, so I put the ear cushion on to help keep the phone in place to prevent dropping it, a very real concern if not really kept secure in the ear opening.As a suggestion, the earbud is intended to be worn with the pushbutton switch upwards instead of down -- something that I missed going through the photos here on Amazon -- and I made the mistake of wearing it wrong, making it a bit awkward and hard to listen to until I recognized my mistake in wearing them with the switch down.Putting the switch up immediately made this much more comfortable and easier to hear.Also, it's worth mention that every person's ear shape differs, so you it's worth the time to adjust the earphone to get a proper seal and comfortable fit, and you really want to be sure to keep it in properly or it can fall out and either get destroyed hitting a hard surface or lost, tiny as it is.I'm sure there will be some people who confuse this earbud with the type of earbud equipped with a microphone to use to take phone calls, so let's make it clear that this is for listening only.As a minor downside, the instructions are written in poorly translated English, but it wasn't hard to figure out how to use these the first time.There is only the one button to control this, so I'll explain the three ways that the button is used:1) With the earphone off, hold in the button for three seconds until the (female) voice starts to say "Power On," then immediately release the button.This is of course a toggle, so holding it in for three seconds while already on powers down the earphone.2) In order to pair the earphone with a transmitting Bluetooth device, start with the earphone powered down, activate pairing mode from the transmitting device, quickly hold in the button on the earphone for five seconds straight, extending the button press beyond the spoken "Power On."Immediately after the spoken "Power On," it will now flash blue and say "Pairing."I use this primarily with a Sandisk Clip Plus that identifies it as a Nenrent device on screen, so watch how your own transmitting device recognizes the device, then be sure to have the transmitting device add it to its list of trusted devices, and you're ready to go.3) If you're listening with the earphone and wanting to pause rather than fully power down, simply click the switch once and the audio instantly pauses, requiring only another click to start playing again.As a small consideration, there is a tiny bit of latency (lag or delay) with transmission using my Sandisk Clip Plus and laptop, something that I believe is inherent to the transmitting device rather than the earphone itself, as there is at least one review on Amazon from someone who states that he had no latency while using the earphone to watch movies, an application that would make any latency most annoying.This isn't really a concern for me, but it's worth mentioning for those who may at first fault the earphone.The earphone can work its way out if you bounce around a lot, at least for me with my rather narrow ear opening, so it's probably a good idea for the average user to occasionally check and readjust should the earphone start to work its way out while exercising or otherwise doing activity that could shake it loose.I've already had that happen once, with the earphone landing on a tile floor, but thankfully the earphone didn't get damaged, probably because it's so well constructed (polycarbonate?) and light, but nothing is invincible, and something so tiny is easily lost.The charging cable this comes with is a USB cable with a conventional USB-A connector (plugs into any computer USB jack) on one end and a tiny connector on the other end to insert into the earphone jack, and a blue LED comes on when charging; and you'll know it's fully charged when the LED goes out after a little over one hour or less depending on how far the battery is depleted when first plugged in for charging.It also comes with two ear cushions, so it's nice to have one extra.The charging cable is specific to this earphone, so it's nice that, at least currently, Amazon (Prime!) has a reasonably priced package sold by Nenrent that includes a cable and two ear cushions for those who may damage or lose either of these items.To be helpful, here's the current direct link to that - I've had another of these for years but had to replace it, the sound quality was terrible this time around, constant faint buzzing in the background.UPDATE (June 5th, 2020): The support center reached out to me after I left this review and has offered to send another at no charge! They have been so helpful and all their products have a 1 year guarantee. I will give it a try and hopefully it's the same high quality I remember from my first purchase years ago. They fit so well in my ear, better than the replacements I got, so hopefully! I'll update again when I try it out!UPDATE (June 11th, 2020): I have received my replacement ear bud and it's just as good or better sound quality than I remember my first purchase being. And this ear bud truly does fit better than any ear bud, it's like it disappears in your ear, unnoticeable and I can sleep with it in when I'm listening to something my partner doesn't want to listen to. I highly recommend this product, and especially the support team, they are terrific!As you can see in the images, the earbud is very small. It fit perfecly, and is very discret. Sound quality is very good and clear specifically for talking to phone or listening to radio or music.It is easy to pair with you smartphone or laptop. It coming with a specific charging cable, is not a micro USB or USB-C. It charges very fast, and the life listenign music is around 7 hours.Also is coming in a nice hard box, to keep it safe.I brought this product so that I have one ear avilable for street sounds, so can safely walk around whilst listening to my books and podcasts. Personally I think it is great for the purpose that I brought this for. However playing music is OK but clearly limited due to only having one ear bud. I found it quite comfortable to wear and remained in my ear most of the time. Battery life was 5/6 hours and found it easy to pair up with my phone. Would purchase again.Not as small as I thought, can pass as a hearing aid but if you have long hair you can get away with listening to music while getting work done without jealous colleagues reporting. Excellent battery life, much better then my expensive wireless headphones. Comfortable fit but if working out can be a bit slippery due to Sweat. Good buy, not disappointed .Sound is not great, however remember what you’ve paid.Battery is awesome, when charged the first time properly!As for comfy ness - it’s absolutely wonderful/dangerous.You won’t feel this ear bud and I have gone to bed sometimes with it still in my earHardly notice (it’s There).