AAS Cellular GSM Security Alarm System Pet Immune (R) Wireless home security-freedom from land lines and internet. Easy installation, no drilling or wiring required 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