Keyestudio 4DOF Manual page 203

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the HC-06 module.
Note: HC-06 Bluetooth module is only compatible with Android system, not support Mac.
Specification Parameters:
 Bluetooth Protocol: Bluetooth 2.1+ EDR Standard
 USB Protocol: USB v1.1/2.0
 Operating Frequency: 2.4GHz ISM Frequency Band
 Modulation Mode: Gauss Frequency Shift Keying
 Transmit Power: ≤ 4dBm, Second Stage
 Sensitivity: ≤-84dBm at 0.1% Bit Error Rate
 Transmission Speed: 2.1Mbps(Max)/160 kbps(Asynchronous)；1Mbps/1Mbps(Synchronous)
 Safety Feature: Authentication and Encryption
 Supported Configuration: Bluetooth Serial Port (major and minor)
 Supply Voltage: DC 5V
 Operating Temperature: -20℃ to 55℃