BT-65 Earphone delivers an outstanding up-to 6 hours of music play time in one charge. Super bass, HD clarity, 40mm drivers, Battery type: Rechargeable-polymer battery. Operating range: 12 meters (with no obstacle). Battery capacity: 2x65mA, charging box 950mA. Ultra sleek is made with premium quality materials and exudes a luxurious urban look. Charging port of charging case : for iPhone. Bluetooth version: V4.2.