Mpow&reg; Streambot Mini Wireless Bluetooth 4.0 Audio Music Streaming Receiver Adapter with 3.5 mm Stereo Output and Hands Free Calling for Car Music or call switching, free and relaxed. Super clear and flow conversation effect. Simple and Easy Wireless Set-Up, 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. Simple operation, normal speaker become hands-free Bluetooth speaker magically, portable for vehicle mounted systems. Two-link: can connect two Bluetooth devices at the same time. Over length receiving distance, can reach up to 30 feet in open space without cables. Inner Li-Battery, over length battery working time, lower power consumption.