mini bluetooth usb adapter ISSC 3.0, ESI software, V2.1+EDR class 2, operation range up to 20m Cheapest ... Spectrum: FHSS5. Data Rate: (Bluetooth v1.2) 1Mbps or (Bluetooth v2.0) up to 3Mbps 6. I/O Interface: USB v1 ... : (Bluetooth v1.2) <0.1% BER at -80 dBm(Bluetooth v2.0) <-82 dBm (typical), GFSK9. LED Indicator: Single LED10. Color ... Weight: 2g, Gross Weight: 26g Mini Bluetooth USB dongle with V2.1+EDR