Ultrasonic Distance Measurement Control Board Rangefinder Digital display for HC-SR04 8 bit MCU module

Description:
Board Size: 24.2*35.1mm
VCC,GND: 5V power interface
2.54mm White Socket: 5V power interface
TX: module serial port transmit pin
RX: module serial port receive pin
NRST,SWIN: preset STM8 program download port