Door and window sensor for outdoor use. Detects the opening and closing of doors and windows. Suitable for outdoor use, IP55 rated. Real-time notifications. Yale Horizon technology with a 1 km range. Compatible with the Yale Smart Alarm. Up to 100 alarm accessories can be added. With the Yale outdoor door/window contact, you can monitor the opening of all doors and windows outside your home. This security device can be installed on any door or window in the outdoor area, such as a gate, shed, garage, or other outdoor structures. It operates at a distance of up to 1 km from the hub, allowing you to detect potential break-ins before they occur.