Modify the baud rate, device name, passkey, master or slave mode via AT command, please indicate the support of the baud rate 2400---1382400.
Built-in Bluetooth chip BC417143
High-board antennas
Suitable for Bluetooth adapter, Bluetooth phone use, master-slave can also be used in double
Can be set for the module control parameters and control commands issued via AT commands
Provide 7 input and output ports, scalable user IO resources
Work status indicators; connection with the non-connection state signal output, easy to track the status of module MCU
Great for embedded wireless serial transmission alternatives

Bluetooth Specification v2.0+EDR
USB protocol: USB v1.1/2.0 
Frequency: 2.4GHz ISM band
Modulation: GFSK(Gaussian Frequency Shift Keying)
Transmit power: not more than 4dBm, Class 2
Sensitivity: not more than -84dBm at 0.1% BER
Rate: Asynchronous: 2.1Mbps(Max) / 160 kbps
         Synchronous: 1Mbps/1Mbps
Security features: Authentication and encryption
Support profiles: Bluetooth serial port (master & slave)
Power Supply: +3.3VDC 50mA
Working temperature: –5°C to 45°C
Max. serial baud rate: 1382400bps, support for hardware flow control transfer
Dimension: 26.9mm x 13mm x 2.2 mm

Applications:
Mouse, keyboard, joystick
Computers and peripherals
GPS Receiver Instrument
Industrial control