Ncredible1 Wireless Bluetooth Headphones (Black) Bluetooth Wireless 4.0. Real 30 foot+ range. 15 hours of listening time. 100 hours of stand by High quality 40mm driver diameter. Noise reducing. Sensitivity 95 + 5db/1KHZ, 128mV. Impedance 16 + 15% Ohm. Rated/Max power 15mW/30mW Works with IOS and Android up to 30 feet. Convenient Earcup Controls Integrated control allows you to answer/disconnect calls and play/pause your music Built-in Rechargeable Battery Up to 15 hours of listening time Recharges in less than 2 hours Convenient Earcup Controls Play, pause, forward, backward, volume control Call, answer, end, reject, last number redial Portable, Foldable Design 3