Alarm sound when the thief pushes open the door or windowLow and good quality, easy to install and useScope of use: doors and windows in a wide range of such as homes, shops, factories, warehouses, etc.The product is small and exquisite, easy to install, and the double-sided adhesive tape provided is easy to install on the door or window.It is a cheap, , economical and practical technical precaution. Simply paste the main and auxiliary parts on the door and door frame, or on the two windows, and align (leaving a space of about 5 mm). the thief prys the door, prys the window, attempts to steal (the main and auxiliary parts are separated), the alarm can emit a strong siren, deterring the thief, reminding the and the people around to catch the thief. When you to open the door or window, you can control it by the switch. It is suitable for anti-theft of residential houses, offices, counters, etc.Power supply: 2 batteries of size 7 (not included in this unit, need to be prepared by the customer)Alarm sound: 90 dBinstallation :1. Use double-sided tape to fix the to the door/window,2. Glue another bar magnet to the door frame in a straight line along the prompt line of the .3. When checking the , set the switch to the "ON" position.4. Open the door and see if the siren sounds.Colour:WhiteMaterial:ABSPackage Contents:1x Alarm