Features: 1.120dB Volume: Door and window sensors are high enough to detect entry, keep kids and babies out of the house, and keep your home office, garage, dorm or apartment. 2.Easy Installation: Easy to operate, press the on off switch, power on off, remove the double sided tape on the back, and attach the door handle alarm to the target location. 3.Prevent Danger: Prevent any accidents, keep kids away from cupboards, above ground swimming pools, alcohol. Monitor wandering, sleepwalking, and the elderly to get up on their own to avoid all kinds of dangers. 4.Applicable: Magnetic door sensor switch to detect your door or window. Perfect for homes, offices, shops, garages, dorms, apartments, and even RVs. 5.Premium Material: The door window alarm is made of high gradey ABS material, with 6 LR44 button batteries, working current 60mA, working voltage 4.5V. specification:Item Type: Door Magnetic Alarm Material: ABS Working Current: 60mA Working Voltage: 4.5V Volume: 120dB Battery Type: 6 x lR44 Button Battery (Built in) Battery Capacity: 948mAh PackageList: 2 Sets x Door Magnetic Alarm (4 Pieces) 1 x Manual