120dB: The magnetic door and window alarm sensor adopts 120dB to remind people that the door or window is open Function: It prevents children from going out without notice and serves as an entrance warning for your home, office, apartment, garage, etc Adjustable: The for ultra-thin door and window alarm has 2 adjustable settings (off/on) Installation: Easy to install, no wiring required, no screws required, comes with double-sided adhesive! Sensitive: Using an for ultra sensitive low battery indicator to check battery life, Weight: 0.08377565956 Pounds, Manufacturer: Zambuph