Meross Smart Door and Window Sensor (Hub Required) Meross HomeKit Hub is needed for installation. Works with Apple HomeKit, Amazon Alexa, and is compatible with SmartThings. Voice Access: Know the status of the device via HomePod / Siri. Alert: Your Meross app or Apple Home app will receive an alert instantly when the alert condition is detected. Low Power Consumption: Up to 18 months lifespan with the built-in battery. Automation: Set triggers to control other Meross devices in the Meross app. Control Up to 16 Devices: One hub can control 16 Meross devices (sensors, detectors, thermostat valves) simultaneously.