Key Features . View your home from anywhere in the world using the Cave appEasily paired and configured into your existing Cave systemCave is wireless easy to set up and use The Cave Wireless Door/Window Sensor is designed for use with the Cave Smart Home system. A high performance infrared sensor it accurately detects human body movement and effectively avoids false alarms. Easily added to your existing Cave system using the Cave App. Simple to integrate The Cave Contact Sensor is simple to integrate into your existing Cave system. Fits easily to any door or window frame using 3M sticky pads. Free App - No monthly charges Cave is fully App controlled set alarms when away from home or add an IP camera to your system and view your home remotely. The Cave App is free there are no monthly charges for using the App. Add unlimited accessories Cave is modular using a secure barcode system you can add unlimited Cave accessories to your starter kit. Accessories can be paired to the App in minutes..