Protect FamilyThis touch sensor could secure main access points and trigger the alarm when the door/window is opened. The very loud 120 dB buzzer rings out thieves, making them safer to use. Wide range of applications This door glass sensor can monitor your home 24 hours a day. Use it on doors, windows, cabinets, drawers or anywhere you want to be notified when it is opened or closed. Doorbell/AlarmEasy operation, single button control of doorbell/alarm switch, dual mode can be selected. Safety Essential ItemsWith this alarm installed in your home, office, factory, when doors and windows are opened by children or theft, it will alarm you to check the safety. To stay in the hotel, you can install this anti-theft alarm on the door and window, it will protect you when you leave, take it for your next use. Easy to UseWindow burglar alert requires no special wires. Just hang on the interior door button, open the switch, the window opening alarm will scare away unwanted intruders, leaving you and your home well protected. Specifications: Condition: New Material: ABS plastic Color: white Power supply: 3*AAA battery (excluded) Alarm sound: 120dB Alarm mode: Induction + Touch Installation mode: Hang on door, window Package weight: about 61g Instructions: 1. Ensure that the applicable environment is stable, without any factors causing the products in the room to shake and vibrate. 2. Install 3*AAA batteries and dial them with the desired alarm sensitivity (H/L/0). General L level selection. 3. Hang the product on the door/window handle and open the switch statically to start working. 4. The alarm sounds at 120 decibels when someone wants to open the door/window illegally. Package List: 1*Alarm