If you are looking for a professional and door sensor, then your research is over here. That's because our product can meet your need. Adopted of , it is practical and durable for long time use. It is not easy to get deformed and bring you much convenience. Features -Color: White -Material: ABS, components -Size: 8.20X5.00X2.50cm/3.22X1.97X0.98in Battery: Accuracy: <5mm - Using the principle of magnetic control, real-time monitoring of the opening and closing status of doors, and drawers. - Linked with to . By sticking the two parts of the sensor on both sides of the door, window, drawer, etc., you can remotely know their opening and closing status through the APP. - After leaving home, you can remotely check the status of doors, and drawers at any time. - A variety of intelligent linkage methods, with intelligent gateways and other intelligent products, door and window magnetic sensors can realize a variety of intelligent linkage methods: linkage intelligent scene, leaving mode, when there is no one at home, strangers break in, gas leaks, dangers such as broken water cannot be ignored. - When and are closed, the scene of leaving is automatically activated to comprehensively monitor abnormal dynamics at home and protect the safety of family members and property. Package list: 3 x pair of window sensors