. Category Specification Headphones Frequency Response: 20 Hz – 20,000 Hz Impedance: 32Ω at 1 ,000 Hz Sensitivity (@1 kHz): 107 ± 3 dB Input/Output power: 30 mW Drivers: 40 mm, with Neodymium magnets Inner ear cup diameter: Width 56mm / Length 67mm Ear Cup Cushion Type: Oval cooling gel ear cushions with memory foam Connection Type Wireless USB Wireless Range 12 m / 40 ft Wireless Frequency 2.4 GHz Battery Approximately 16 hours Microphone Frequency Response: 100 – 6.5 kHz Signal-to-Noise Ratio: > 50 dB Sensitivity (@1 kHz): -42 ± 3 dB Pick-up Pattern: Unidirectional