YoLink Door & Window Sensor
Know When Your Doors and Windows or Other Items Have Been Opened
Handsome Design Fits in With Most Decors
Clean, Modern Shape, Pleasing White Color
Smart Home Industrys Longest Range, By Far! 1/4 Mile, Open Air Range
LoRa (Long-Range/Low-Power) Squeezes the Most Power Out of Standard AA Batteries (5+ Years!)