Bluetooth module specification:

Parameter specification

Frequency: 2.4000-2.4835GHz

Modulation: GFSK

RF channel: 79

Channel Interval: 1MHz

Input Voltage(v):1.8v/3.3v

Input Current(mA): 28mA(under DH5 type)

Transmit Power(dbm): reach to class2, less than 4dbm

Accept singal range: -80~ -20dbm typ

Receiving Sensitivity:-90dbm

Module Dimension(mm): 20(L)×13(W) ×2.0(H)

Support for Bluetooth Protocol Version:V2.0+ EDR: compatible withv1.2& V1.1