bluetooth adaptor

Model BT D550 Standard Bluetooth V1.2 USB Interface USB V1.1/2.0 compliant RF Output Power Class 2 Range Up To 25m In Open Space Transfer Rates (Max) 1 Mbps Spread Spectrum FHSS (Frequency Hopping Spread Spectrum) Frequency Band 2.4GHz Unlicensed ISM Band Build-in-security 128bit encryption Antenna Built-in Antenna Operating Power Powered by USB port directly Sensitivity -89dBM @0.1%BER LED Indicator Power Working System Windows98SE / Windows ME / Windows2000 / Windows XP