Razer Opus Headset (RZ04-03430100-R3M1) - Frequency Response: 20 Hz – 20 kHz, Impedance: 12 Ω (1 kHz), Earcups: Circumaural, Earpads: Protein Leather / Nylon with Foam, Microphone Style: MEMS, Microphone frequency Response: 100 Hz – 10 kHz, Volume Control: Yes (VOL + and VOL – buttons), Compatibility: 3.5 mm Connection: Mobile/System/Console/Airplane BT Connection: Mobile/System, Battery Life: Up to 25 hours with ANC on, Connection Type : Bluetooth and 3.5 mm connections