Aizbo Mini Wireless Bluetooth 4.0 Audio Music Streaming Receiver Adapter with 3.5 Mm Stereo Output and Hands Free Calling for Car(black) Bluetooth Receiver, Highly cost-effective wireless stereo audio receiver Car Transmitter, Music or call switching, safe and relaxed for driving Two-link: can connect two Bluetooth devices at the same time Automatically connect: just turn on the Bluetooth of the cell phone first, and then turn on the Bluetooth receiver, the Bluetooth receiver can be automatically paired 3.5mm stereo audio output, inner 170mAh Li-Battery, LED indicator, one touch connect button