HCI interface: USB1.2/2.0; Transmission range: 10m; Working voltage: 5V; Operation: class 2; Standard: Bluetooth 4.0+EDR; Receiving sensitivity: -75dB; Output power: 0~+4dBm; Audio codec: 16bit codec; Connection: Piconet/Scatternet Support; Bluetooth profoles: A2DP, HFP, HSP; Frequency band\: 2.4G ISM band.