... profile Compatible with all Bluetooth cellphones Works well with Skype, MSN, and VoIP Wired & Wireless headphone USB cable used ... , clear sound, and anti-interference Frequency: 2.4GHz Bluetooth range: 10m SNR ≥ 90 db Support Windows98/win2000/ ... Bluetooth call time: up to 7 hours By CE,Rohs approved Accessories: Manual, Speaker Cable,USB Charging Cable, Adapter,Microphone(Optional) Wireless Bluetooth ...