Expand your Yale Smart Alarm System flexibly with wireless sensors for your doors and windows. With the Yale indoor window and door sensor, you can easily monitor the status of your doors and windows, securing the most important and simplest access points against potential intruders. Through the Yale Home App, you receive real-time notifications as soon as someone opens or closes a door or window, or if someone tamper with the sensor. At the same time, the Yale alarm system immediately scares off intruders with a loud siren. With its slim profile, this sensor is ideal for tight spaces and seamlessly integrates into your home decor. It can be easily and flexibly mounted in the desired location using the included installation materials, either by screws or adhesive pads.