Features: 1WiFi connection it can be directly connected via WiFi and can be used alone without a gateway. 20.5mm immersion detection it can test a wide range and can be pushed to the mobile application at the fastest speed. 3No need to install you just need to put it in a leakprone place and the product is waterproof. 4Support intelligent scene control it can carry out linkage scene setting help you build a smart and convenient life. 5Powered by a 450mAh lithium battery it supports charging and can help you last for a long time. Specification: Item Type: Leakage SensorWeight: Approx. 73g / 2.6ozProduct Size: Approx. 7x7cm / 2.8x2.8inMaterial: ABSBattery Capacity: 3.7V 450mAh Lithium Battery (Battery Included)Working Temperature: -20C~85CCharging Interface: DC 5V 1A (Micro USB)Connection Method: For ZigBee Package List: 1 x Host1 x Charging Cable1 x Reset Needle1 x Chinese and English Manual