This high tech security device can save you hundreds of dollars a year in monitoring fees. It can "guard" your home or office seven days a week, 24 hours a day. If an intruder is detected it will sound a powerful 125 decibel alarm to scare away the would-be intruder and alert those inside to the attempted entry (the alarm feature can be disabled if you prefer a silent alarm). Up to three phone numbers are automatically dialed and your pre-recorded message (up to six seconds long) is played. You could program it to call your neighbor, the police, and your cell phone and play a message like, "This is John Doe, an intruder has been detected in my home located at 123 Maple St." No monitoring service is necessary - this alarm does it all! Features include: Simple Operation - can be installed by anyone in only minutes Keypad Operation - arms and disarms using a keypad (you set your own security code) Delay Setting - entry and exit delays help prevent false alarms Warning Decals - two alarm system warning decals are included Auto Dial Alert - uses your current phone line (an additional line is not required) to call up to three phone numbers with your recorded message Requires four 'AAA' batteries (not included)Unit measures: 1.75 x 2.75 x 6.75 inches