AAS 500 Wireless Home Security Alarm System Kit DIY (R) 32 defensive zones containing up to three sensors in each Phone line anti-cut function [warning sound alerts to line tampering]. sh alarm monitoring 24/7 and sh instalation Auxiliary power back-up system for continuous operation during power outages Memory storage capacity for 6 phone numbers [21 digits in length] and recorded message Programmable entry and exit delay. Capability to be professionally monitored