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)