Features:Simple pairing.Good anti-jamming.Bluetooth low energy Radio USB Dongle.Dual-mode Bluetooth transfer.Low-power selectable 1.2 to 3.6 VI/O.Supporting Bluetooth voice data.Supporting multi languages.Wlan coexistence interface.Backward compatible with Bluetooth v1.2/2.0/2.1/3.0.Specifications:Version: CSR4.0Supporting profiles: Dial-up， Fax， LAN access， and Headset Operation system: Windows 98， 98 se， Me， 2000， XP， Vista， Windows7Interface: USB complianceRate: 3MbpsReceiving/Sending range: 20mCertifications: FCC， CEProduct size: 2.3 * 1.2 * 0.4cmPackage size: 13.1 * 10.7 * 0.5cmPackage weight: 23g