Black, 7.1 surround sound, multi-platform, incredibly light (250g), and a pliable cardioid microphone characterize the Razer Kraken X gaming headset. Personalized 40mm Drivers Handheld controls Specifications of the headphones: (Impedance: 32? @ 1 kHz, Freq Response: 12Hz ~ 28KHz, Connection: Analog 3.5mm) Microphone Specifications (Unidirectional ECM Boom Pattern, Freq Response: 100Hz-10kHz) This is RZ04-02890100-R3M1.