Spec:

Item Type: Serial Port Module
Material: Plastic
Operating Standard: BT SIG v2.1+EDR
BT Protocol: BT SPP
Interface Interface: RS232
Communication Rate: 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600, 1382400bps
Modulation Method: 2.4G ISM Direct Sequence Frequency Hopping (FHSS)
Communication Distance: 15 Meters in Open Space, Class 2 Level
Transmit Power: 4 dBm
Receiving Sensitivity: -79dBm
Working Voltage: 5V
Working Current/Sleep Current: 40mA/1.6mA (Typical Value)
Working Environment Temperature / Storage Environment Temperature: -10-50 Degrees Celsius / -20-80 Degrees Celsius
Size: Approx. 56.5 x 38.5 x 14.5mm / 2.2 x 1.5 x 0.6in

Package List:
1 x Serial Port Module

How To Use:
The module is connected to the computer:
1. Convert TTL level to RS232
2. Module power supply 3.3 V
3. Connect TX and RX Connect RX and TX
Module and various TTL level MCUs Equipment connection:
1.TX and RX are connected RX and TX are connected
2. Module power supply 3.3V