YoLink Smart Home Kit — Hub + 4 Door/Window Sensors, Instant Alerts, 400m Range (LoRa)

Know exactly which door or window is open right now — from your phone, wherever you are. The moment a sensor detects movement, it fires an instant alert via push notification, SMS, or email, depending on how you set it up. LoRa technology covers up to 400 meters, reaching basements, sheds, and garages where Wi-Fi simply doesn't go. Each sensor runs up to 5 years on a single set of batteries. Stick them on in minutes with the included 3M adhesive tape — no wiring, no drilling. Works with Alexa and IFTTT.