1. Door magnetic induction technology: The product is equipped with advanced door magnetic induction technology, which can accurately detect the opening and closing states of doors and windows. When an unauthorized intrusion or unauthorized door opening/closing occurs, the alarm will immediately emit a high - decibel alarm signal to remind you to take prompt action. 2. Sound reminder: The alarm has a high - decibel alarm function. When the doors and windows are illegally opened, it will emit a loud sound, which can effectively deter thieves and attract others' attention. At the same time, it also has a sound reminder function for opening and closing doors, allowing you to keep track of the status of your home's doors and windows at all times. 3. Easy installation: The product adopts a simple and easy - to - understand installation method and can be easily installed without complex tools. Moreover, this product is small, lightweight and space - saving, suitable for various door and window installation needs. 4. High sensitivity and high stability: The product has high sensitivity and can quickly respond to subtle changes in doors and windows, ensuring that the alarm is triggered immediately. At the same time, it has stable performance and can operate stably for a long time, providing reliable safety protection for your family. 5. The doorbell rings when the door is opened. 6. When the door/window is opened (the distance between the main unit and the magnetic strip is greater than 1 cm), an alarm will be issued immediately. 7. Applicable scenarios: It is suitable for doors and windows in residential environments such as houses, apartments and villas with anti - theft requirements, especially for key areas such as entrance doors and anti - theft doors and windows for monitoring and protection. 8. Warm reminder: Please read the product manual carefully before installation and operate correctly according to the instructions. Regularly check the alarm status to ensure its normal operation. 9. Included: Remote control model: Five main functions: 1 x sensor door, 1 x remote control.