✔Description 54mm x 86 mm ✔Feature 1. Semi-permanent use, durable and durable 2. Convenient portability (credit card size) ✔Noted 1. This is a simple detector, not a universal detector. 2. Text may be erased 3. Do not bend more than a certain strength. 4. Cards overlap each other and are stored at the factory, so there are little scratches. ✔How to use 1. Cover both camera and flash with Molguard. 2. Turn on the flash and press the video recording mode (video) with the flash turned on. 3. While taking pictures of the suspected area, move the camera at various angles so that the light enters the suspected area in the front. 4. If you have a small shiny object, it may be a hidden camera.