Features: Detection distance is 2~30cm (can be adjusted through the potentiometer); 35 detection angle. Adjust potentiometer clockwise, the detection distance increases; counter-clockwise tuning potentiometer, detection distance is reduced. The output port OUT can be directly connected to the microcontroller IO port, you can directly drive a 5V relay. Connect type: VCC-VCC; GND-GND; OUT-IO. Adopt the comparator LM393 for stable working performance. The working voltage is DC 3.3V to 5V, red power indicator lights up when power on. With the screw holes of 3mm, easy fixed installation.