LWM Wireless Bluetooth 3.0 EDR Stereo Audio Receiver Music Partner Handsfree Adapter for Cellphone Portable Music to Speaker/Woofer/Car Speakphone via AUX Built-in MIC to support hands free call function Built-in rechargeable battery, playing time up to 16 hours Supports Bluetooth v3.0, AD2P and EDR technology, transmission distance up to 10 meters LED indicator light Audio output: 3.5mm stereo jack port