Was indeed quite a bit skeptical because the only remaining Steroeheadsets start from 50 euros, but wanted to give it a try. Use I do it on a Samsung Galaxy Note and the Google Nexus 7. The battery life is very good, so far longest service without charging was h 13. Empty I have not yet drawn, been using it mainly for listening to music and watching movies , The processing may seem a bit rickety, but keeps. Only when you hear very quiet pieces, can while running a slight rattle of attached to the right side keys stand out, which do not sit on enough voltage to prevent this. Say these headphones are to be used, for example, while jogging, I would strongly advise against. Use it to go in normal or sit, so it is for me not a negative point. When using a stereo device should be disabled on mobile phones or other devices in the Bluetooth settings on your headset to select "phone audio" or the mode of "Telephoney Duplex (HSP / HFP)" in "High Fidelity playback (A2DP)" (designation may vary, change here from a Ubuntu 12.10). With A2DP a higher quality codec used for the transmission of the sound that makes a noticeable difference even for a layman. The range is very good, my entire apartment can wander without demolition of the connection, ie the range of more than 5m, which is mentioned in other reviews can confirm quite. For phone mode, I can say little because I rarely use this to be able to give an objective judgment to him. It is interesting that the importer of this product, the Pearl Agency in Buggingen is known to many through the so-called. PEARL catalog. I have not made the effort, but maybe you can also purchase through the product, if necessary with a voucher even cheaper. For me, the purchase has fully paid off in any case.