R4 mp3 & mp4 Players spotify Player with Bluetooth and WiFi 4-Way HiFi DAP Android 12 OS 3.5mm po+4.4mm bal 32G+2TB Scalable Memory

This Device is great if you want to listen to music offline. There is a lost of settings and customization within this device that takes a while to get used to but works well. The option to expand the storage is a plus and easy to access within the device when importing music. Connecting to bluetooth is easy to do and the sound quality is convenient but it does not compare to listening to it with wire headphones, there has been latency and skipping if I'm using bluetooth while I'm walking so keep that in mind while exercising. The touch screen is not very responsive at time compared to your usual smartphone but the physical buttons make up for it. The device itself is well made and sturdy as well. Overall this is a great modern Mp3 player/DAP for the price the pros overweighs the cons in my opinion.

GREAT product! Downloaded 200GB+ FLAC files and at least 50GB of Spotify music to 1TB microSD over Wifi using SyncThing and Spotify, drained battery by 45%. This is incredible. Took a nap while it finished downloading a couple dozen GB of FLAC files on the charger, was cool to the touch and fully charged when i woke up several hours later. Spotify CANNOT be used while downloading files to microSD card, nearly unusable, even on a high speed card. The music i listen to all the time (using bluetooth, Spotify, Very High) is noticeably enhanced. I have not tested with wired headphones yet, but I assume the enhancement would be even higher. Connects and works well with both my vehicles bluetooth systems (Microsoft Sync and Generic GMC). Today it was 96 degrees F and downloading both Spotify and SyncThing/FLAC at the same time produced noticeable heat, but not much more than my phone while browsing facebook. The system is blinding fast and reacts to button presses immediately. The bit perfect system is very apparent. Very easy to use. I really can't find a reason to complain about this device. Besides maybe not having a GPS chip so I could use it entirely instead of connecting my phone when i need to get directions. But that is not the point of this device. I like the color better with the TPU case on and the warmth of the device when syncing so much data, at the same time, in nearly 100 degree weather would have been a bit much to comfortably hold the device for a sustained period of time. Storage capacity is adequate for testing the device, but you will want to use a microSD card formatted in exFAT format (mine came preformatted). I got the green one, and instead of the neon green, with the TPU case on, it is more of a forest green. I was between this and the M300, and the battery life is worth not having an onboard speaker. Body is aluminum and glass, very high quality and durable build quality.

I purchased this on a bit of whim as I thought it looked really cool but I wasn't prepared to fall in love with it. You would be forgiven to think, why would I need a device like this? I have my phone and it has access to all my music. The reason is very simple, this device was made for music from the ground up, full stop. It sounds really good, it handles absurdly large music libraries with ease from an SD card, it's very easy and intuative to use and it has physical buttons to skip around very quickly. Its running Android so if you know what you are doing you can load or customize it in anyway you want. But the best part is that it is NOT your phone. Your music listening experience is not going to be interrupted by notifications or phone calls or other such distractions and so the experience is very different from a phone. It allows you to focus on the music itself which is a breath of fresh air.

Sounds fine, nice little DAP for the price point, only thing im going to complain about is the glass. Ive had this for 5 days and the screen already has a decent sized scratch and a bunch of smaller ones from i don’t know what. I take good care of my devices i dont know where this came from. If you get one, it sounds amazing but you need to make sure you baby it. Also the included screen protector is cheap plastic, and theres no alignment bracket, due to the oblong screen its nearly impossible to install. 2 stars for the sound, 3 stars removed for the subpar screen and screen protector. Edit 3/8/25 Added 2 stars because this little device does really sound good and because customer support reached out and at least attempted to help. I bought a 6 pack of screen protectors and it works great. If you do get this, i have had no issues with battery life or heat as some people claim. It gets slightly warm when running my 80 ohm cans but nothing excessive. Its a good product, just get a screen protector because the screen genuinely is weak. You WILL not install the included screen protector on the first try. I would recommend Hiby either include more screen protectors or an alignment bracket.

Would not recommend at all. I have had this for 7 months. Everything started out great. Very easy to use, adding music to it was not difficult, the music quality with a decent pair of IEMs was good. It was everything I could have hoped for in a DAP at this price point. The battery slowly started to have issues after a few months and now it won't charge. It acknowledges it is being "charged" but will not actually take a charge. I have tried the OEM cable and different USB-C cables, I have tried charging via a brick plugged into an outlet. I have tried charging using my PC. Nothing works. It was great while it lasted, but I will not be purchasing another Hiby product again.

I bought this last year and am very satisfied. The owners manual could be better...but I would imagine that to be the case with most music players. I am a devout Old School Dinosaur....listen to Motown, Philly, Disco and blue eyed soul. This is perfect for that...and it plays loud and clear!!! I would characterize the sound as warm, detailed and clear. Perfect balance...no need to use the equalizer. I had a Hidiz player for years...this makes that sound like junk. It is extremely open and pleasant to listen to. Listening to my Old School R&B is such a pleasure with this player!! I had also purchased an expensive ($650) Fiio player to compare it to. Never got to the music. The Fiio had a card tray for the SD card that was poorly designed. Couldn't figure it out and had read reviews that mentioned many flaws with the software. Sent it back. If they are too stupid to design things right....you get the picture. This Hiby is GREAT!!! And at the price...you can't beat it!!!

II must express that this device is truly remarkable. I had been anticipating something similar, but it fulfills all my requirements. Wi-Fi - check. Bluetooth - check. Expandable memory - check. You can download any song you desire and store it on the expandable memory. Moreover, it boasts excellent wired and Bluetooth capabilities. Admittedly, the battery life is not as long as one would hope, and it may be a bit bulky, much like myself. However, overall, I am thoroughly enjoying this compact MP4/MP3/DAP player. It is ideal for when you're on the move. I was on the verge of purchasing an Apple iPod Classic for the same price, but this device seems to meet all my needs with just the right amount of technology, including a USB-C charger. My only reservation is regarding the battery life, but only time will tell.

If you are new to DAPs, these require a learning curve. The main reason, imo, to have a DAP is for very good listening experience without being distracted by your phone. In other words, these are for folks who love to listen to music, sometimes called amateur audiophiles. I purchased the HiBy R6 III soon after it's launch and it is a good DAP but with multiple issues. The volume knob would stick and require significant pressure to turn. These are Android devices so if you're unfamiliar with Android it may take a little time to learn. You can download the browser of your choice. These devices have three different EQ interfaces that are very good yet also take time to learn how to use. HiBy has zero online explanation of these so you'll spend a lot of time playing with the system. NOTE, you can go do deep as to set EQ on individual tunes and it is then saved to the device. Perhaps some helpful info: 1. The R6 III has been in China for over a month supposedly being repaired. (The repair process was very difficult. Buy these at your own risk.) 2. I purchased the R4 in the meantime and it's as good as if not better than the R6 III with a few exceptions. (I have also purchased an additional R4 as gift.) 3. The R4 has side buttons for volume instead of a knob. Much better. 4. The R4 screen is not a bright but more than sufficient. 5. The HiByMusic interface is clunky and requires a lot of patience to use. 6. You will not get long battery life / use out of these devices no matter what they say. Even YouTube reviewers can be way off. I might get 6 hours in 1 day then it has the be recharged. So if you plan to use on travel, be sure you have a charger, cable... 7. When you use TIDAL, Qobuz, etc. music sources, it's quite a challenge to use these away from Wi-Fi access. In other words, the DAP won't play music you have downloaded to the device through a music source. I have a friend who uses Amazon music and his experience is excellent with downloading, art work, etc. (But AmazonHD is a lower res than other music sources.) 8. When you download your own music to the device (or I recommend a microSD card) you will have your music whether or not you have Wi-Fi access. 9. HiBy tech support is slow and inadequate. You are kind of on your own and may find help on YouTube or forum reviews. 10. The 4.4mm is the bomb. Using high end IEM's with a balanced cable is THE game changer. That is the primary reason, imo, for these HiBy DAPS that offer a true balanced 4.4mm connection.