BH-M20C Wireless Stereo Bluetooth V4.1 Headset Office Gaming Headset (Black) Parameter: 1. Bluetooth Version: V4.1+EDR (enhanced data rate) and compatible with V2.0 and V1.2 standards 2. Chipset: CSR BlueCore8 stereo chip 3. Support Bluetooth Function: A2DP, AVRCP, Headset, Profile, Handsfree Profile 4. Power: Class 2 5. Frequency: 2.4G 6. Transmission Distance: 10m 7. Microphone Sensitivity: -45dB (0dB=1V/Pa, 1KHz) 8. Weight: 97g 9. Talk Time: About 12 hours 10. Standby Time: About 250 hours 11. Charging Time: Less than 8 hours 12. Charging Current: 80mA 13. Charging Voltage: 5V 14. Working Voltage: 3.3-4.2V 15. Ambient Temperature: For battery storage and lifespan, try to keep the battery temperature between 15-25 degrees Celsius 16. Applicable Models: Compatible with PS3 game consoles and ordinary Bluetooth mobile phones, with wireless Bluetooth transmitter, can be used for online voice chat. Features: 1. The appearance is stable and the workmanship is exquisite 2. Anti-noise technology, with digital DSP signal processing, keeps the call clear 3. Compatible with most Bluetooth mobile phones and other Bluetooth devices 4. Suitable for office use 5. With Bluetooth adapter, you can enjoy wireless fun when using SKYPE, MSN or Internet phone 6. Clear call effect can bring convenience to the office and free hands