Uioipr hidden camera detectors is a small electronic device that is used to find hidden devices like spy cameras, hidden cameras. This anti spy detector has 2 ways to detect hidden devices : 1. WIFI signal scanning Mode: turn on the device, it will automatially searching the WiFi signal devices in the recent environment. When it detects unknown WiFi signals, it will emit "beep" sound to remind you. You can carefully find the device then. 2. Infrared light scanning Mode: switch to this mode, you can use your eye look through the Red filter on this device. By looking through the red filter, it will show an obvious Red Dot Reflection if it finds a camera. That's the reflection of camera lens. And then you can find the camera location exactlly. This device can be used for indoor security, hotel, bedroom, bathroom, dressing room, airbnb, rental house, etc,.