This Visonic door sensor is a must-have for anyone looking to increase the security of their home. With its reliable performance and durable construction, this door sensor is the perfect addition to any alarm system. The sensor is designed to detect when a door or window is opened, triggering an alarm to alert you of potential intruders. The Visonic door sensor is specifically designed for use with alarm systems and is compatible with a range of brands and models. Its compact size and sleek design make it easy to install and discreet, ensuring that it won't detract from the appearance of your home. This door sensor is ideal for use in a variety of settings, including homes, offices, and businesses.