AAS 600 Wireless Home Security Alarm System Kit DIY (R) Wireless, portable, expandable - no drilling or wiring Self monitoring: Calls six phone numbers with intrusion alert 24/7, no fees or contracts Portable and Expandable:add sensors and sirens as needed with seamless integration. If you move simply take the system with you. Qualifies for homeowner insurance discounts up to 20% Professional monitoring capability with International Contact ID function