... 0 + EDR compliant, backward compatible with v1.2 and 1.1USB interface fits both Desktop PCs ... controller, L2CAP, SDP, RFCOMMLogicfor forward error correction, header error control, access codecorrelation, CRC, demodulation, encryption ... external power supplySpecificationStandard: Bluetooth V2.0Chipset: CSR BlueCoreFrequency: 2.4~2.48 GHzSymbol rate: 3MbpsAntenna: IntegratedReceiving / Sending rang: ...