Detects flood and protects your property, IP67, Zigbee, Local & Remote Alarm, Automatically Turns off Solenoid Water Valve, When the water level reaches up to 0.5mm, the Water Leak Sensor will trigger the Hub to sound an alarm and send a notification to your phone, can be used through HomeKit with the Aqara Hub.Dimensions: 50 × 50 × 15 mm Battery: CR2032