51 Microcomputer Ultrasonic Rangefinder Module Reverse Radar Alarm HC-SR04 Kit
ab 9,51 €
HC-SR04 ultrasonic ranging module 1. Finished rangefinder 1. 5V active buzzer 1. OLED LED&RGB. The alarm distance can be set. After pressing the setting button, you can press the plus or minus keys to modify the alarm distance, and it has the function of saving after power failure.
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