Nexum Aqua Portable Battery-Free, in-Line Headphone DAC and Amplifier - Android MicroUSB, Space Grey

Functions of skip track does not work on Samsung S7 Edge, after dealing with seller on the first item Amazon intervened and sent replacement but unfortunately this one also has the same issue once plugged in it disables the headphone controls so now basically you have to use the phone to used the pause and skip function.Not at all convenient to use.It does offer modest amplification but at the cost of not being able to use my headphones control by the way I’ve tried them on three different very good headphones.

This works great on my Samsung S7 Edge. I do wish the cable were a bit longer. I mainly got it so I'd have volume control without reaching into my purse. They make my cheap  Edifier H650 Hi-Fi On-Ear Headphones - Noise-isolating Foldable and Lightweight Headphone - Fit Adults and Kids - White  sound better than they are. I've been using it daily for six weeks now and I haven't had problems with durability yet, but I baby it and store it in a case with my headphones when I'm not using it. I use it for about 2 hours a day on my commute.

Stop working after 2 weeksVery very bad

I had been using this with my Galaxy Note 4 and my Audio Technica ath-m50x's, have to say I was pretty pleased with the results. This product was the first of its kind I'd seen for such an affordable price, I tried it on my friends Xperia, my Note 2 and 4 and all worked plug and play no issues. The only thing I had issues with was the keyboard functionality when it was plugged in, but I'm sure I could of worked it out with android 5.1The sound itself was richer and i didn't feel the need to use loads of EQ's anymore to achieve the sound i wanted, it was a product ideal if you wanted to push your headphones that little bit further. However after a few weeks use i'm sad to say the connecting cable had a loose connection, i had been so careful to ensure the cable was never under any pressure and I was gutted when this happened.Never the less i was refunded and i will be keeping my eye out for a second model if they release one, would love to see this released with higher durability

Started out wonderfully. Really loved the sound, the size and everything about it; would have given it five stars...until it stopped working. Purchased it in October, dead by December, just outside the return cut-off point.Have plugged it into my phone, tablet and followed the support advice on the Nexum website, but to no avail: it's not coming back. Extremely dissapointed as I have really looked after it: no using it on the move, just seated at my desk at work and kept in a hard case when not in use. No way of contacting Nexum on their website either. In future I think I'll buy from a more established company.In summary: Great idea, flaky quality. Not worth risking the money in my opinion.

I could not get this to work with my phone (Sony Xperia Z5 Premium) - even after updating the Nexum firmware according to the manufacturers instructions. When the Nexum was connected, the phone gave an error "too much power was being drawn from the USB port, disconnecting all devices", so I suppose that the Z5 is not powerful enough to run it. I returned the device for a refund, which was given.

After 1 week of usage, it stopped working. It won't turn or or give any sign of life no matter where I and how connect it to, with or without the adapter.... TERRIBLE!! I want a refund!

+ sehr gute Audioqualität | 24bit 192kHz (Wolfson WM 8533 DAC)+ hohe maximale Lautstärke | 100mW Verstärker (MAXIM 97220)+ sehr gute Verarbeitung+ klein & leicht (nur 18g)+ Android & Windows kompatibel ohne Treiber (sollte auch unter Mac & Linux laufen)+ USB Adapter zum Betrieb am PC im Lieferumfang enthalten+ Firmware upgradefähig- geringfügig höherer Stromverbrauch am Smartphone, da der Aqua Strom über micro USB bezieht (70 mA)- könnte etwas günstiger sein