Security door alarm, 120DB window door alarm, 4 sets for hotel

120DB: Security door alarm with 120DB to detect entry, preventing children and babies from leaving the house, protecting the security of your home or office.

Easy Installation: Ultra-thin door and window alarm, can be easily installed on any door or window without damaging your furniture.

High Accuracy: The doorbell alarm is suitable for children sleeping alone, the elderly, and pregnant women, offering high accuracy and no false alarms.

Easy to Use: When the door is opened, the main unit emits a 120DB alarm sound. When the door is closed, the alarm stops.

Low Voltage Warning: You'll easily know when to replace the batteries with the door alarm's low battery indicator, so you don't have to worry about it not working.