General description This Door Alarm set includes two wireless sensors designed to enhance home security by detecting the status of doors and windows. With four multifunctional modes—general alarm, constant alarm, time delay (closing alarm), and doorbell—users can easily select the desired function with a simple button press. The alarm emits a loud 108dB sound to deter intruders and alert you to unexpected movements, making it ideal for child safety and home security. Technical specifications Alarm volume: 108dB Delay options: 3, 15, 30, or 60 seconds Power requirement: 2 AAA batteries (not included) Operating distance: Maximum 2cm between alarm and magnetic strip Battery life: Over 2 years Compatibility and accessories Suitable for doors and windows, including freezer, refrigerator, sliding pool doors, cabinets, shops, offices, apartments, and hotels. Installation Easy installation with self-adhesive pads—no tools required. Align the alarm and magnetic strip according to the alignment arrow. Ensure the installation distance between the alarm and magnetic strip does not exceed 2cm. Usage Can be used as a door stopper alarm, pool door alarm, garage door alarm, or sliding door alarm. Helps prevent children from sneaking around and alerts you to the presence of pets or elders.