Razer Kraken Xbox One Headset -Closed ear cup design for maximum comfort,drivers: 40 mm, with Neodymium magnets,proprietary port for connection to the Xbox One Controller,individual controls for game and chat volume Optimized weight for extended wear,Closed ear cup design for maximum comfort,Frequency response: 20 – 20,000 Hz,Impedance: 32Ω at 1 kHz,Sensitivity (@1 kHz, 1 V/Pa): 110 ± 4 dB at 1 kHz Max,Input Power: 50 mW,Drivers: 40 mm, with Neodymium magnets