• Product Type : Headset with Microphone, Connection Type : Wireless, Usage Type: Headband, Connection Input : USB, Audio Output : 20Hz ~ 20 khz, Impedance : 39 Ohm (passive) / 5000 Ohm (active), Sensitivity : 87.5 dB SPL/mW, Frequency Response : Headset: 20Hz~20KHz / Microphone: 100Hz~10KHz, Distance : up to 20 meters, Speaker Diameter : 40 mm, Warranty : 24 Months, Description : DTS Headphone: X 2.0,