Features:High-performance AMP chip， can push the headset， and high-power speaker， applicable to most types of speakers.Simple operation，3.5mm Male to Male Audio Connector or 3.5mm Male to Male Audio Cable to connect the speakers and the receiver.Built in Mic.Whether you want Bluetooth convenience in your car， through your home-theater system， in your kitchen， bathroom， or bedroom， etc.Powered by built-in rechargeable li-ion battery via mini USB port long working time and low consumption. (Mini USB cable included)Specifications:Bluetooth version: 3.0Bluetooth profile supported: A2DP， HSP， HFP， OPP， OBEX， DUNFrequency range: 2.4GHZ-2.4835GHZChipset: OVC 3960Audio quality: High acoustic fidelity soundInterface:1 * 3.5mm Audio; 1 * Micro USB(for power supply)Working Voltage/Current: 3.3?4.2V/30mAEffective distance: 10~15m(Max 20m no obstacle)Audio Port: 3.5mmColor: BlackMaterial: ABSDimension: 5.3 * 2.5 * 1cm / 2.1 * 1 * 0.4inWeight: 11g / 0.38ozPackage size: 10.8 * 7.6 * 2cm / 4.2 * 2.9 * 0.8inPackage weight: 42g / 1.44ozPackage List:1 * Bluetooth Music Receiver with Built-in Mic1 * Micro USB Power Cable1 * 3.5mm Stereo Inlet Socket1 * User Manual(English)