Features: 1. No need fixed telephone lines, having GSM frequency is suitable to use. 2. Can dial ... 8. Learning code,easy to learn and add the wireless sensors as your want. 9. Can use mobile(telephone ... power is off. 12.Main panel supports all kinds of wireless detectors, PIR, infrared balusters, smoke sensors, gas sensors, ... for cottage, house, shop, garage, company, wherever GSM Network is present.