This 21st century 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 and call for help if an intruder is detected. The SmartScan Auto Dialer consists of a wireless transmitter and a receiver. The receiver will  automatically dials up to three preset phone numbers including your cell phone or the police and plays your prerecorded message, (can be installed by anyone in only minutes). Phone cord and AC adapter included, runs on your current phone line (an additional line is not required). Requires six 'AA' batteries.