RPMSD v4.1 Car Bluetooth Device with Audio Receiver, 3.5mm Connector  (Black)

1 Bluetooth 3.5mm Phone AUX Audio MP3 Car Stereo Music Receiver Adapter with Mic 2?Make your Car AUX audio sytem and Home Theater AV HiFi Surrounding system become bluetooth compatible, get music from Bluetooth enable device such as For Smart cellphone or Bluetooth PC, Laptop. 3?Simply connect this bluetooth audio receiver to your line-in or auxiliary input on your speakers, pair it to your Bluetooth enabled Whether you want Bluetooth convenience in your car, through your home-theater system, in your kitchen, bathroom, or bedroom,etc. 4?High-performance AMP chip,can push the headset,and high-power speaker,applicable to all types of speakers 5?Powered by built-in rechargeable li-ion battery via mini USB port , long working time and low consumption. (Mini USB cable included)