120 dB Door and Window Alarm – 4-Pack Wireless Hotel Systems, Optimal Security, Easy Installation

120 dB: Security door alarm with 120 dB to detect entry, preventing children and babies from leaving the house, thus protecting the security of your home or office. Simple 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, with high accuracy and no false alarms. Easy to use: When the door is opened, the main unit will emit a 120 dB audible alarm. When the door is closed, the alarm stops. Low voltage warning: You'll easily know when to replace the batteries thanks to the door alarm's low battery indicator; don't worry if it doesn't work.