I bought 2 to associate with each other (one in transmitter "TX" and another in "RX" receiver) and connect a conventional headphones. No doubt, the sound quality is much better than the material without Bluetooth apt-X - and therefore satisfactory for listening to music. It is also suitable for TV because there are no image / sound lag. Small and light, the receiver in your pocket without problems or even hanged after the headphone wire. Visually, the build quality seems impeccable. The power supply is via a micro-USB cable that plugs into so any power or USB. I had a little trouble for the first time the association: the manual is in English and a little difficult to address. You must activate the association mode receiver side before activating the search mode transmitter side, and to activate these modes must be pressed long enough on the "multi-function button." The association with a receiver is necessary only once: after that, there just has to turn on / off the transmitter and receiver, just to save the battery when not in use. I made the test to associate a non apt-X Bluetooth headset transmitter: it also works (with its obviously less good).
The product is 100% in line with my expectations. The purchase price was great for a device (1) with apt-x which significantly improves the sound quality and (2) that allows many uses through 2 modes transmitter and receiver, and all the mini jack connectors and RCA provided to connect to common audio inputs and outputs.
At the partner White Crew: very fast delivery, very well packaged parcel.