Extract from SM10 User Guide: The SM10 is a Bluetooth dual stream stereo transmitter based on Bluetooth 2.1+EDR technology. You can connect various audio devices such as mobile phone or MP3 player by using the SM10. It also supports onboard audio systems of specific brands by using optional audio cables. Along with the dual streaming feature of the SM10, both you and your passenger may listen to the same music or radio at the same time by using most any Bluetooth headsets in the market. The SM10 has an AUX audio input that enables you to connect additional non-Bluetooth audio devices such as a radar detector or GPS navigation. About 7 years old. Was £20 now FREE plus postage (or it goes to landfill)
