Big Loud Alarm: Door and window sensors provide a loud alert to detect entry and help prevent children and babies from leaving the house unnoticed. Ideal for securing your home office, garage, dorm room, or apartment whether you are present or away. The alarm is easily heard from another room, providing immediate notification. To prevent tampering by young children, mount the device out of their reach. Suitable for use on sliding doors, windows, drawers, and refrigerators. Helps protect your property from unauthorized entry through doors and windows. Easy Installation: Clean the surface, peel off the adhesive backing, attach the alarm to the door and the magnetic strip to the door frame. No tools required. Securely mounts with strong adhesive. Perfect for doors and windows in homes, apartments, mobile homes, offices, hotel rooms, garages, and more. Note: Measurements are manually taken. Please allow 1-3 cm variation due to human error. Color may vary slightly due to lighting and display differences. Actual product may differ slightly from images shown.