WiFi Tuya Temperature Humidity Sensor for Smart Home App Alert Monitoring Indoor Hygrometer Thermometer Coupling Features: Wireless Smart Temperature Humidity Sensor -- 230 Ft wireless transmission outdoors and low power. Our long-range coverage enables use in areas that are challenging for most residential Wi-Fi systems, such as basements, outdoor porches/patios, sheds, detached garages, even remote outbuildings on your property. Real-time Environmental Monitoring with Alarms -- Stay informed about current temperature and humidity for critical equipment and rooms, and receive instant notifications of changes based on your personal criteria. APP Remote Control -- The App displays current temperature and humidity, allowing you to easily control your home environment by adjusting app-connected appliances, such as air conditioners to adjust the temperature or smart plug-connected humidifiers to promote a comfortable living environment. Hub Free -- No hub required, simply connect our smart temperature and humidity sensor to your Wi-Fi router and add our devices to the smart app. You can use it freely without time and distance limitations. Large LCD Screen -- Large LCD screen with clear and large characters, easy to read even at a distance. Stylish white design with rounded edges, a great addition to your home decor. Wifi Smart Temperature Humidity Sensor Color: White Material: ABS Wireless Technology: WIFI Working Voltage: DC 4.5V (3 x AAA battery not included) Transmission Frequency: 2.4 GHz Low Power Indication: Yes Working Temperature and Humidity: -10 ℃ - 55 ℃, 0 - 100% RH Wireless Distance: 7M (open air) / Indoor 20M Size: 64 * 64 * 28mm Packing List: 1 * Wifi Smart Temperature Humidity Sensor