-Mpow Bluetooth Music Receiver Built-in Noise Isolator -Bluetooth Audio Adapter Music Streaming Sound System No Battery Never Power Off (Bluetooth 4.1 Dual Link Auto-Reconnect -BUILT-IN NOISE CANCELLATION CHIP -Compared with most receiver without noise isolator -Mpow Bluetooth receiver is upgraded with built-in noise isolator for suppressing background noise and letting you enjoy high quality music feast. -Booth receiver is upgraded with built-in noise isolator for suppressing background noise and letting you enjoy high quality music feast. -PLUG & PLAY: Mpow receiver has no built-in battery, you can use the included USB charging cable (No charger) to supply power, which saves you free of worrying the battery life. Simply plug the cable and the receiver will be turned on automatically. -EASY SETUP: Mpow Bluetooth receiver can connect to 2 smartphones simultaneously. More conveniently, the receiver will connect to the last connected smartphone automatically when it is turned on. -WIDE COMPATIBILITY: The 3.5mm audi