It is a Bluetooth transmitter, which produces loud speaker via a 3.5mm audio plug to connect to a Bluetooth receiver, such as Bluetooth headset or Bluetooth and so music can play. I use the transmitter mostly on the stereo system or TV to send so that the sound on my Bluetooth headset. The transmitter is supplied with a USB charging cable and a user manual. The manual is available in six languages, including German. It is clearly structured and explained everything in detail and easily. First you have the small and handy device to be charged via the USB port, which takes about two hours. The operating time is then about seven hours. Commissioning is not a problem, just plug the transmitter into the 3.5mm audio connector and press the the transmitter for approximately six seconds button until it blue / red flashing, then he will automatically connect to the bluetoohtfähigen receiver which in the immediate close (the manufacturer recommends no more than 90 cm) is to be located. The transmitter transmits the sound without delay and in good quality. The ten meter range can be achieved in an open area, in the house to get a blanket or wall. Conclusion: A successful way not compatible Bluetooth to make devices with audio plug Bluetooth capable. My equipment was tested all compatible with the transmitter.