Razer Kraken Ultimate USB Surround Sound Headset (RZ04-03180100-R3M1) - Frequency Response: 20 Hz – 20 kHz, Impedance: 32 Ω (1 kHz), Earpads: Heat-Transfer Fabric / Leatherette / Memory Foam, Microphone frequency Response: 100 Hz – 10 kHz, Virtual Surround Encoding: THX Spatial, Battery Life: None, Lighting: Underglow earcups, Connection Type: USB Digital, Compatibility: Devices with USB Connector