DESC: Easy-to-use and cost-effective D.I.Y. (do-it-yourself) wireless intruder alarm system kit. Supports up to 60 wireless sensors (15 wireless defense zones and 4 wireless sensors per zone). Transmit at 430-433MHz frequency band, wireless transmitting distance up to 300 feet (remote controller, smoke sensor, and siren) and up to 450 feet (magnetic door/window sensor and PIR motion sensor). Supports up to 5 phone numbers for auto alarm call and 1 management center protocol(CID). Easy ¿one-key¿ armed/disarmed operation.