1Real time monitoring of door or window switch status, after connect with the Tuya APP, you can check the change on your phone. 2Voice view function: After connect with the intellifent voice assistant like Alexa Home to check the status of s-ensor, which is convenient and intelligent. 3History record function: You can check the door or window open or close history record on the Tuya APP, which can let you know the doors and window switch at any time. 4When the door or window open or close, the door mag-net will immediately senses then sends the notifications to the Tuya APP. 5Different scenarios linkage, you can use this intelligent s-ensor with other home devices, for example, you can use the door s-ensor with the alarm device and bulbs. 6Wide application: You can use this sensors at home, store, office, mall, apartment or other places, which has wide ranges of uses.