Cool knight Over Ear Dsh-iiib Stereo Bluetooth Headset Sport Bluetooth Headset CSR chip, HD audio,DSP de-noising, bluetooth 4.0, DSH-IIIB , universal compatibility True stereo sound Human body engineering, sporty design, high quality life,fashionable appearance, hipster necessary Listening to music more than six hours continuously,More than 8 hours on call,More than 100 hours of super-long standby