What should criminals do if they install a wireless high-definition surveillance camera that does not need to be connected to WiFi and electricity?

First of all, it is not recommended that you scare yourself. After all, tp is still a rare case in hotels. Besides, there is no such camera as you mentioned. A camera is an electrical appliance. How can it not need electricity? Then what is it based on to record the information it shoots? Movies? If so, you don't have to be blind to see it. There are cameras that don't need WIFI, but there are few, especially the tp you are worried about. Because in addition to transmitting data through the network, the most space-saving is the SD card, even the smallest SD card needs to occupy a considerable volume, which is not conducive to concealment.

Go to the room to check the set-top box, TV set and other equipment with hole structures such as indicator lights to see if any parts are loose, which is different from other parts nearby. If there is, it's probably a camera. In addition, you can consider turning off the lights and taking a photo with your mobile phone camera. If you see red light, you can recognize that this is a camera with infrared rays.

Please adopt it if it is useful.