5-Piece Wireless Personal Security Alarm Sensor for Door and Window, Home Security Alarm for Door and Window

Describe: Main Material: Plastic Color: White Size: As shown in the picture (please confirm the size!) Features: High quality, easy to install with adhesive, sticks to the window or door, ideal entry warning for houses, apartments, mobile homes, offices, hotel rooms, garages, etc. Can detect your door or window, super loud alarm. When someone illegally opens the door or window (the relative positions of the main and secondary components change), the alarm can emit a loud alarm sound to warn the intruder to leave and alert the owner, with exceptional applicability and stability. Note: Please allow 1-2 cm differences due to manual measurement