Specifications: 1) Compliant with the Bluetooth V1.1 specification 2) Class 1/2 operation 3) Support the audio transmission among the devices 4) Powered from the PC 5) Full speed USB interface 6) LED status Software upgradeable 7) Built-in Antenna 8) Frequency band: 2.4Ghz ISM band 9) Maximum rate: 1Mbps 10) Sensitivity: 89dBM 0.1%BER 11) 20 / 100 meter working distance 12) Profiles: Dial-up Networking/Local Area Network 13) Access/Fax/Serial Port/Synchronization/File 14) Transfer/Generic Object Exchange