1. Stereo wireless headphone 2. Use PLL technology to make sure the transmitting and receiving more reliable and stable 3. Wireless talking on Internet 4. Moveable microphone, comfortable for talking or playing internet game online 5. Receiving by point to point, convenient to operate 6. Auto mute function available for headphone 7. Recharging function for the headphone 8. Preset 3 channels to avoid possible interference 9. Transmission frequencies: 2403.0MHz, 2403.5MHz, 2404.0MHz 10. S/N ratio: >55dB 11. Transmission distance: 100 meters(without obstacle) 12. Power requirement: Transmitter: 12V AC adapter (included), Receiver: 3 X AAA rechargeable Ni-H batteries (not included) 13. Suitable for global markets