PROTECT YOUR FAMILYThis touch sensor secures your main access points and triggers a loud 120 dB alarm when the door or window is opened, scaring away thieves and keeping you safe. VERSATIPLE APPLICATIONSUse this door sensor to monitor your home 24 hours a day. It can be used on doors, windows, cabinets, drawers or anywhere you want to be alerted of their opening or closing. ESSENTIAL FOR SAFETYInstallation of this alarm in your home, office, factory can detect the opening of doors and windows by children or thieves, alerting you to check security. When you stay in the hotel, install this anti-theft alarm on the door and window to protect you while you are away, then take it with you for future use. EASY TO USEThis alarm for burglar-proof windows does not require any special wire. Simply attach it to the interior door button, open the switch and the alarm will go off when the window is opened, protecting you and your home. Note: The data are all measured manually, please allow 1-3cm error due to differences in light and display, there may be color differences, please refer to the actual item received.