Convenient leave-in wireless receiver: Tiny nano receiver stays in your computer so your headset is always ready to use Clear stereo sound: Laser-tuned speaker drivers and noise-cancelling microphone for clear calls. Frequency response (Headset): 40Hz - 10KHz , Frequency response (Microphone): 100Hz - 6.5kHz Long-range wireless: Listen and chat up to 10 m (33 ft.) from your computer-and longer with a six-hour rechargeable battery