【Product Description】 Thank you for viewing. This is a smart opening/closing sensor that allows you to check the opening and closing of doors and windows from outside the home. No hub is required; you can use it simply by connecting the main unit to your router. By registering with the Smart Life app, you can also link it with other devices, such as compatible cameras. ■ Product Features ・ Convenient for security and monitoring, allowing you to check the opening/closing status from outside the home. ・ Easy setup: no hub required, just connect the sensor to your router. ・ Compatible with the Smart Life app, allowing連携 with other smart devices. ・ Compact design that can be attached to doors, windows, refrigerators, first-aid kits, etc. ・ Notifications are sent even if the main unit cover is removed, further enhancing security. ■ Included Items ・ 2 AAA alkaline batteries ・ Adhesive sheet ・ Reset pin We will carefully package and ship the item. Immediate purchase is welcome. Thank you for reading to the end. We look forward to your consideration.