1, turn off the power. Because pinhole cameras consume a lot of power, photographers may use the power in the room. You can turn off the main power supply of the room, and the pinhole camera will not work normally.

2. Reduce the illumination. Turning off the lights in the bathroom will reduce the illumination, and ordinary wireless pinhole cameras (except those with low light infrared) can't take a clear picture. This is one of the easiest ways.

3. Avoid the entry and exit of unidentified persons. Pay attention to whether the doors and windows are closed when taking a bath. You should look around first to see if there are any suspicious people or inappropriate items. The above is the way to see if there is a camera in the university bathroom.