Features: Indoor Temperature and Humidity Monitor: intelligent track the temperature and humidity change in your home, which all real-time readings can be checked on your APP. Quick & Easy to Install: it is a battery-operated sensor that can be placed in any corner of your house to monitor the room temperature and humidity. Installation without any tool, simply stick the sensor on the surface of the wall or device and see it nicely to work for you! Intelligent Linkage: when temperature and humidity detector check temperature is too hot/the air is too dry, it will linkage with home automation to control air-conditioner/humidifier on or off. APP Remote Control Linkage Scene: it can also be combined with other devices to design and implement smart application scenarios. Ultra-fast response, anti-interference ability, ultra-low power consumption and cost-effective. Wide Application: widely applied for home, office, reptiles, plant grow tent, incubator, greenhouse, terrarium, car, etc. Specifications: Version: WiFi / Zigbee (Optional) Material: ABS Wireless Protocol: 2.4GHz Wi-Fi Working Voltage: DC3V Recommended Temperature Range: 5~60 Recommended Humidity Range: 20%~80%RH Power Supply: 1 * 3V CR2032 battery Item Size: 51 * 51 * 16.5mm / 2.01 * 2.01 * 0.65in Item Weight: 20g / 0.72oz Package Weight: 29g / 1.04oz Package Size: 8 * 7 * 2cm / 3.15 * 2.76 * 0.79in Package List: 1 * Sensor 1 * Sticker Note: The ZigBee Version needs to be used with Zigbee Gateway (NOT included)