Key Specifications: * Connection Type: 2.4GHz Wireless via Transmitter. * Driver Size: 50mm Neodymium. * Frequency Response: 20Hz – 20kHz. * Impedance: 32 Ohms. * Closed Over-Ear design for noise isolation. * Built-in rechargeable battery lasts up to approximately 15 hours. * Detachable microphone with Mic Monitoring feature to hear your voice while speaking. * 4 preset EQ modes (Bass Boost, Treble Boost, etc.). * Wireless range up to approximately 9 meters (30 feet).