Fuji Labs Wireless HD2000 Professional Stereo Headphones - Black

Up to 42 hours of music playtime and up to 48 hours of talk time depending on volume. 320 hours on standby. 10-20,000 HZ frequency response. 150 m W Max Input Power. 40mm Driver Diameter. Lithium Polymer Rechargeable Battery. 103 d B+/-3 d B Sensitivity. For Apple i Phone's / i Pad's / Android devices / Smartphone devices w/Bluetooth connectivity. Integrally Molded into one piece.