Bluetooth Module HC-06 , Serial TTL 4PIN

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