Razer Opus Actic Noise Cancelling ANC Wireless Headphones

FREQUENCY RESPONSE: 20 Hz - 20 kHz 
IMPEDANCE: 12 Ω (1 kHz)
SENSITIVITY: 105 dB/mW by HATS (1 kHz)
DRIVER SIZE - DIAMETERS (MM): 40mm
DRIVER TYPE: Dynamic Driver
EARCUPS: Circumaural
INNER EARCUP DIAMETER: Major Diameter 91 mm, Minor Diameter 69.5 mm 
EARPADS MATERIAL: Protein Leather / Nylon with Foam
NOISE CANCELLING: Active Noise Cancellation 
CONNECTION TYPE: Bluetooth and 3.5 mm Connections 
WEIGHT: 265 G
MICROPHONE STYLE: MEMS
PICK-UP PATTERN: Omni-directional
MICROPHONE SENSITIVITY: -38 dBV / Pa (1kHz)
Virtual Surround Sound: None
VOLUME CONTROL: yes