DOBERMAN SE-0701 Oval Household Anti-theft Door and Window Magnetic Spring Sensor Super Loud Simple Alarm 1. Simple alarm that activates when a door or window is opened and the magnetic sensor separates from the magnetic strip, triggering an immediate alarm sound. 2. Produces a 120-decibel sound to effectively deter intruders. 3. Equipped with an on/off switch for easy control and activation as needed. 4. Energy-saving battery design provides approximately 1 year of standby time. 5. Features EVA strong adhesive on the back; simply remove the protective sticker for direct installation. 6. During installation, mount the magnetic strip within 1 cm of the main unit along the marked scale line to ensure proper alarm activation when the door or window opens. Product specifications: 1. Remote control battery (included): 3 AG13 (LR44) button batteries. 2. Suitable for use in homes, dormitories, rental properties, hotels, wardrobes, phone cabinets, and similar locations.