How to check the hotel camera only needs to prepare a mobile phone.

1, the camera of the mobile phone is sensitive to infrared rays, so you can turn off all the lights and power equipment in the room first.

2. Form a strict darkroom environment. Now turn on the camera of the mobile phone.

3. Then aim the camera at the part that needs attention, and keep your eyes on the mobile phone screen at all times.

4. Look around the room. If there is infrared light, there will be bright spots on the phone screen. After the bright spot is found, the position of pinhole camera is basically determined.