Bluetooth protocol: Bluetooth V2.0 protocol standard Power Level: Class2( 6dBm) Band: 2.40GHz—2.48GHz, ISM Band Receiver sensitivity: -85dBm USB protocol: USB v1.1/2.0 Modulation mode: Gauss frequency Shift Keying Safety feature: Authentication and encryption Operating voltage range: 3.3V to 6V Operating temperature range: -20ºC to 55ºC Operating Current: 40mA Small dimensions: 39 x 16 mm
