Note: The Aqara Hub M1S requires a secured 2.4 GHz Wi-Fi network connection. One Aqara Hub M1S can connect up to 128 Aqara devices (Aqara Zigbee repeaters required). Thanks to the latest Zigbee 3.0 protocol, the M1S supports all existing and latest Aqara devices based on the fastest, most stable, and energy-efficient technology..FLOOD DETECTION: Whenever the Aqara Water Leak Sensor detects water, it can send an alert to your phone and activate the local alarm on the Aqara Hub to prevent leaks and flooding..Focus on Security: A powerful 2-watt speaker can be used as an alarm or doorbell as well as via configurable automations. Apart from the Aqara Alert System, the M1S supports all 4 HomeKit alarm modes. High-quality components and design are not only a subtle addition to any room interior but also make the M1S more reliable by achieving constant airflow through its large, perforated base..WIRELESS & SENSITIVE: No wiring or screws are required. The ultra mini design allows you to put it anywhere that dripping and leaking could happen. Our water leak sensor is designed with sensitive leak probes which the threshold of the water level is 0.5mm..All-Round Compatibility: The Aqara Hub M1S makes your Aqara devices compatible with a wide range of smart home ecosystems and voice assistants. Apple HomeKit, Google Assistants, Alexa, Mi Home* and IFTTT are supported. In addition, If you have any questions, please feel free to contact us. * Mi Home support may be unavailable at the time of launch of the product and will be added with a future update.