This compact, easy to install, magnetic contact alarm made by Intermatic (a recognized leader in the security industry) can be used on doors, windows, cabinets, or in anything that opens and closes. It is an ideal security device for home, store, office, etc. If the protected door or window is opened it will sound a powerful 110dB alarm to scare off the intruder and alert you to the attempted entry. 

Features:

• 110 dB Alarm
• Programmable security code
• 30 second exit delay
• 10 second entry delay
• Low battery indicator
• Requires 4 AA batteries (not included)
• Dimensions: 5 and 3/8 x 2 and 3/4  x 1 1/4 inches