Shrih Red Bluetooth 2ch Stereo Audio Headset. Features: Bluetooth stereo headset lets you listen to music or phone calls wirelessly. High-quality speakers deliver crisp,rich. sound.Lightweight,comfortable design for all-day listening. Accept incoming calls or toggle between tracks with the touch of a button. Compatible with bluetooth enable devices,such as iphone,ipad,most computers,cellphone. Omni-directional high quality microphone. Easily charge via USB port. Specification: Bluetooth Version: V3.0 EDR. Bluetooth Profiles: HSP,HFP,A2DPK,AVRCP. Frequancy: 2.4GHz . Frequency response:20-20,000 Hz. Speaker impedance:32 ohm. Transfer Distance:33 FT/10M. Effective Range :10Meters. Music Time: 10Hours . Talk Time 11Hours . Standby Time :Up to 250Hours . Input DC: 5V/180mAh . Charge Time : 3Hour . Dimensions :14.5*10*6cm .