Features: * Multi-point: can connect to two devices at the same time. * IPX4 waterproof level、 protect headphone from rain and sweat. * Magnetic adsorption in earphone back. Not lost easily. * Compatible with most of smartphones and tablet PC. * Hands-free call function. Specifications:          General Specification             Brand Name        Awei             Model Number        A630BL             Optional Color        Grey             Wearing Type        In-ear             Product Weight (kg)        21.1g           Technical Parameters             Bluetooth Version        V4.1             Transmission Distance        10M             Bluetooth Protocol         HFP\/HSP\/A2DP\/AVRCP             Speaker Diameter        10mm             Talk Time        6 hours             Charging Time        1 hour             Noise Isolating        CVC6.0             Battery Capacity        110mAh             Voice Prompt        Support    Package  Included:                  1 X Awei A630BL Bluetooth Headphone            1 X Charging Cable            2 X Earmuffs            1 X Ear Hook            1 X Manual