Thanks to the Chacon Alarm System with SIM card, you're no longer tied to a good WiFi connection at your home or the office. Place a new SIM card (with call credit) in the base station and you'll receive push notifications on your smart device when the alarm system detects anything. The package consists of a base station, a motion detector, 2 magnetic contacts, and 2 remotes. All elements are wireless and can all be placed at any desired place. Expand the system with up to 50 accessories and adjust the system to your type of house.