Spacement of Headsets Wireless Headphone Type Headphone-Microphone Response of Frequency: 20–20,000 Hz Sensitivity of headphones: 118 dB Impedance of the Headphone On-earcup Volume Control A microphone Response of Frequency: 100-8000 Hz Microphone Configuration Two-way omnidirectional range Up to 30 meters Up to twenty hours of battery life 1.5-meter cable length