This small transmitter turns a Bluetooth signal from your phone, tablet or other audio signal to a device not equipped with Bluetooth (radio, stereo etc ...). Easy to pair, good conversion of the signal, overlay a USB port or USB of your cigarette lighter, in short a little "gadget" very useful and cheap. It seems that all comments posted in the topic does not concern this device but the USB dongle brand. * Only L Thierry posted the correct answer to my previous request, thank you to him. For Amazon, please feedback to good ranking, it will avoid the unpleasant comments of some ...