Redlink Bluetooth 4.1 Music Receiver is professionally designed to convert wired earphone?? car stereo?? home audio into wireless device to play music or answer call from phone hands-freely.</br>Promote Bluetooth to 4.1 version for strong connection up to 30ft?? data synchronization between devices?? no sound lag.</br>Longer play time?? built-in battery provides up to 10 hours play and talk time?? continuous music streaming for a day or the whole travel on a single full charge.</br>Wide compatibility?? the audio receiver can connect two Bluetooth enabled devices at the same time?? including smartphone?? MP3?? MP4?? tablet?? etc.</br>Easy control?? with microphone and buttons?? to answer phone calls?? change volume?? play/pause/skip music?? redial the last called number on the receiver. ONE-YEAR WARRANTY.</br></br>Product Desc