Product Size: 65*37*15mm Protect the familyThis touch sensor could secure key access points and trigger alarm when door/window is opened. Super loud 120dB buzzer sounds thieves, safer to use. Wide Range of ApplicationsThis door glass sensor can monitor your home 24 hours a day. Use it on doors, windows, cabinets, drawers or anywhere you want to be notified when it's opened or closed. doorbell/alarm, dual mode can be selected. Safety essential itemsWith this alarm installed in your home, office, factory, when doors and windows are opened by children or theft, it will alarm you to check security. For staying in the hotel, you can install this burglar alarm on the door and window, it will protect you when you leave, take it for your next use. Easy to use Window Burglar Alert requires no special wires. Just hang on the interior door knob, open the switch, the window opening alarm will scare away unwanted intruders, leaving you and your home well protected.