Security System for Your Home - 120 DB Siren alarm not only can cause huge shock to thieves, but also wake you up from sleep to prevent horrible accident. A door and window alarm with wide applications, forcible entry warning, ideal for home, office, hotel, apartments, garages, dorm room, or even RV. Keep Your Children Safe - This magnetic wireless sensor door and window alarm is powerful enough to detect entry, it lets you know when your children open the doors or windows to prevent unwanted children and babies to go out, whether you are inside or outside the house. (audible distance up to 750 ft / 230 m). Especially, if you have a swimming pool at home, it is very necessary to install a door alarm. Smart Design and Easy to Use - Size: 6.4x4. 25x1.7cm, door and window alarm with smart size, alarm sound: >120dB, unique ultra-slim door and window alarm, design with 3 adjustable settings (on / off / set). Alarm triggered by magnetic wireless sensor: alarm triggered after door entry or window opening. Easy to Install with Double Sided Adhesive Tape - Easily Mounted on window or door with tape. No wiring needed No screws needed You can install this alarm on all windows and doors, drawers, doors and other flats. Simple Operation with Batteries Includes - door and window alarm operates through a set of 3 LR44 button batteries, for each alarm, there are 3 LR44 button batteries inside the product, moreover, we give 10 extra batteries. When the alarm is low, you should replace the batteries to better protect your home. 3 Adjustable Settings ON/OFF/SET Switch up ON, open the door, alarm will keep alarming, close the door to stop alarm. Switch middle OFF, means power off the machine. Switch down SET, it is the mode to remind to close the door or window, sound DIDIDI, remind that the door/window must be closed, the alarm stops until the door or window is closed. Features Easy to install, designed for door and window security, installation with double-sided tape, firm and convenient. (The double-sided tapes used separately for the alarm and magnetic strip is included) Easy to use, one-button switch control Power saving, battery included, ready to use. (for each alarm, there are 3 LR44 button batteries inside the product, moreover, we give 10 extra batteries.) System Working Principle Alarm triggered by magnetic wireless sensor It will alarm when the distance between the alarm and the magnetic strip is greater to 10 mm. Door and Window Alarm Wireless Magnetic Sensor Child Home Security System Application Scenarios Home/ dormitory/ hotel for theft Prevent children from climbing out the window and falling Prevent thieves from sneaking through the window Drawer valuables security Power supply: 3 LR44 button batteries Note: When the alarm goes low, you should replace the batteries to better protect your home. Door and Window Alarm Wireless Magnetic Sensor Home Child Security System Installation Easily mounted on the window or door thanks to the double-sided adhesive tape. No wiring needed No screws needed Step 1: Stick the double-sided tape on the back of the alarm and the magnetic strip. Step 2: Wipe the corresponding position of the door/window, stick and fix the alarm, then press hard. Step 3: Follow step 2 , paste and fix the magnetic tape. The gap should be less than 10mm (the two small triangles on the alarm and the magnetic strip should line up). Step 4: Test the alarm. Activate the alarm, open and close the door or window to check if the alarm is working properly. Door and Window Alarm Wireless Magnetic Sensor Home Security System Children Parameter: Alarm sound: >120 dB Size of one alarm: 6.4x4.25x1.7cm Package size for 4 alarms: 19x7x3cm Weight of one alarm: 32g Package weight: 150g Package includes: 4 x Door and window alarms (there are 3 LR44 button batteries in each alarm)