Safe and Efficient to Use: Meross smart WiFi door sensor, compatible with Apple HomeKit, Alexa, Google Home and SmartThings, keeps your home safe and secure. Conveniently monitor your bedroom doors and windows, garage doors, basements, kids' rooms, pet doors, offices and skylights. Note: Meross Hub is required to operate. This is just the sensor. The hub is sold via the "Kit Versions" link

Home Device Automation: Take your home automation to the next level with the Meross Door Sensor and easily set triggers to control other HomeKit and Meross devices with simple automation settings, like house lights turning on when the door is opened. More links are waiting for you to explore

Real-time alarm notifications: Receive alarms instantly in your Meross app, so you can stay informed of important alarms related to your smart door sensors anytime, anywhere, giving you peace of mind and quick action when needed.

Superior Versatility: One hub can control up to 16 Meross sensor devices. The hub uses a low-power 433MHz connection solution and has better wall penetration ability with a communication distance of up to 100 meters (in open areas). The product is equipped with a replaceable button battery, making it smaller in size. The low-power design allows the battery life to be up to two years. Historical data can be recorded for free (2 years) and exported at any time for security audit.

Compact and easy to install: The new stylish mini design does not take up extra space. No tools required, just peel off the adhesive tape and stick it to the desired location. The maximum installation distance of the magnetic sensor is 24mm, which can meet the installation requirements of more complex conditions. Mini primary sensor dimensions (57 x 31 x 15mm) Secondary sensor dimensions (28 x 15 x 11mm).