You can disassemble the device, and then you observe whether the light flashes 4 times when the circuit board is powered on, if yes, the sensor is not installed, if not, the sensor is not detected
You can disassemble the device, and then you observe the circuit board when the light has not flashed 4 times, some words, is not installed sensors, no, is not detected sensors
You can disassemble the device, and then you can observe whether the light flashes four times when the circuit board is powered on. If there is one, the sensor is not installed. If not, the sensor is not detected<br>