General Description: The magnetic sensor of this intruder alarm is designed to protect your home or office by detecting unauthorized entry. It is ideal for use in various environments such as houses, apartments, offices, hotel rooms, and garages. This wireless device is easy to install thanks to its self-adhesive backing, requiring no additional tools. Technical Specifications: Material: Plastic; Color: White; Battery: 2 AAA batteries (not included); Alarm unit dimensions: 3.1 * 9.1 * 1.9 cm / 1.2 * 3.6 * 0.7 inches; Magnetic sensor dimensions: 1.4 * 5 cm / 0.6 * 2.0 inches; Package weight: 37 g. Installation: The sensor is easily attached with self-adhesive strips, allowing for quick and tool-free installation. Operation: This magnetic sensor is equipped with an on/off switch, allowing you to deactivate the alarm when needed. It emits a loud alarm as soon as a door or window is opened, ensuring the security of your property.