Hawk 72-1613 Motion Activated Alarm with Auto Dialer 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: 175 x 275 x 675-Inch