Accurately sense lighting changes: create smart scenes light detection, high sensitivity range smart linkage and life waterproof This item needs to be used with Xiaomi Multimode Gateway. Mi-Light Detection Sensor is based on the Zigbee 3.0 wireless communication protocol. Mi-Light Detection Sensors can detect ambient light illumination and record historical data. With the gateway, It works with other smart devices to create various scenes, such as used as an automation condition according to the change of ambient illumination. Know the Daily Light Changes Low battery reminder push the sensor will accurately record the Daily light change, which can be viewed on Mijia APP. At the same time, when the sensor is in a low battery state, it will push information to the phone. 0~ 83000 lux illumination Range Max. Sensitivity Up to 2 lux Highly sensitive, large range The sensor can accurately detect changes in the ambient light intensity and automatically switches the measurement interval for different light conditions to provide you with accurate light information.