US Compass Portable Stereo Wireless Bluetooth Transmitter Adapter Dongle for TV, Desktop, Laptop, Tablet, MP3/MP4 Player, CD and DVD Players and all other Audio Devices with 3.5mm Audio-out Jack Support mobile, laptop, iPhone, iPad, MID and other devices with Bluetooth function Music or call switching,free and relaxed. Super clear and flow conversation effect Two-link: can connect two Bluetooth devices at the same time. Over length receiving distance, can reach more than 10M in open space without cables. 3.5mm stereo audio output, LED indicator, one touch connect button. Automatically connect, if you need the cell phone connect the receiver automatically, just turn on the Bluetooth of the cell phone first, and then turn on the Bluetooth receiver, The Bluetooth receiver can be automatically paired.