Yale Indoor Window/Door Contact Part of the Yale Home Smart Ecosystem and an accessory of the Yale Smart Alarm, the Yale Indoor Window/Door Contact lets you easily monitor the status of your doors or windows.? Get real-time notifications via the Yale home app as soon as someone opens or closes your door or windows. Depth: 6.85 CM REAL-TIME ALERTS: Instant notifications sent to your smartphone via the Yale Home app. EASY MONITORING: Monitor the status of your doors or windows from anywhere at any time. EXCEPTIONAL RANGE: Up to 1km, and long-lasting battery life, allowing you to protect homes or attached buildings of all shapes and sizes. SLIM PROFILE: Its design makes it perfect for narrow frames of windows and doors. It blends into your home decor without compromising on functionality COMBATABILITY: Works with the Yale Smart Alarm Kit, offering enhanced security and allows you to create a comprehensive system tailored to your needs. EASY INSTALLATION: Effortlessly mount it on your windows and doors using the included double-sided tape or mounting tools. TAMPER-PROOF PROTECTION: The alarm will be triggered if someone attempts to tamper with the device, alerting you immediately. Height: 6.85 CM Width: 2.9 CM