【Family Protection】This touch sensor secures key entry points and triggers the alarm when a door/window is opened. The extra-loud 120dB siren will scare away intruders, providing enhanced security. 【Wide Application】This door/window sensor monitors your home 24/7. Use it on doors, windows, cabinets, drawers, or anywhere you want to be alerted when opened or closed. 【Doorbell/Alarm】Simple operation, one-button control of doorbell/alarm switch; dual mode selectable. 【Essential Security Item】With this alarm installed in your home, office, or factory, if doors and windows are opened by children or burglars, it will alert you to check for safety. When staying at a hotel, you can install this anti-theft alarm on the door and window; it will protect you when you leave, and you can take it for your next use. 【Easy to Use】This window break alarm requires no special wiring. Simply hang it on the inner door knob, turn on the switch, and the window opening alarm will deter unwanted intruders, keeping you and your home safe. Specifications: Condition: New Material: ABS Plastic Color: White Power Supply: 3*AAA batteries (not included) Alarm Sound: 120dB Alarm Mode: Induction + Touch Installation Method: Hanging on door/window Package Weight: Approx. 61g Instructions: 1. Ensure the environment is stable, free from factors that cause shaking or vibration. 2. Install 3*AAA batteries and set the desired alarm sensitivity (H/L/0). Generally, select level L. 3. Hang the product on the door/window handle and turn on the switch to activate. 4. The 120-decibel alarm will sound if someone tries to illegally open the door/window. Package List: 1*Alarm