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, compliant with USB 1.1 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 Access/ Fax/Serial Port/Synchronization/File Transfer/Generic Object Exchange