Tuya Smart Outdoor mini Temperature Humidity Sensor -20-70 Detection Range Mobile App Remote Monitoring Support Gateway Description: Range: Temperature: -20-70(4F-158F) Humidity: 20 percent -99 percent RH Accuracy: Temperature: 0.2c (0.2F) Humidity: 0.1 percent RH Error: Temperature: 0.5C (1F) Humidity: 3 percent RH Power supply specifications: 2 1.5VAAA7 batteries (need to be selected separately) Wireless connection type: Product size: 126mm x 43.2mm x 26. 6mm APP: Tuya Smart Specifications: Smart App Control TUYA Thermometer Hygrometer can help youmonitor the changes in temperature and humidity in real-time ,supporting smart functionssuch as remote monitoring andtemperature and humidity charts High Accuracy The Thermo-hygrometers always provide you with the latest andmostaccurate temperature and humidity changesTemperatureaccuracy ( error value ) is 0.54F or 0.3C ,and humidity accuracy ( error value ) is 3 percent RH Long Standby The greenhouse thermometer and humidity have a built-inbutton battery CR2450 , which is durable and has a service life of 8-12 months . The APP displays the battery level in real time Data Display You can view the recent temperature andhumidity records on the APP , and the histogramand curve graph provide a clear data change trajectory . Package Included: 1xTemperature and hygrometer 1xUser Manual