Description: Range: Temperature: -20°~70°(4°F~158°F); Humidity: 20%~99%RH Accuracy: Temperature: 0.2°c (0.2°F); Humidity: 0.1%RH Error: Temperature: ±0.5°C (±1°F); Humidity: ±3%RH Power supply specifications: 2 1.5VAAA7 batteries (need to be selected separately) Wireless connection type: Bluetooth Product size: 126mm x 43.2mm x 26. 6mm APP: Tuya Smart Specifications: Smart App Control TUYA Bluetooth 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 / 0.3C ,and humidity accuracy ( error value ) is 3% 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: 1*Temperature and hygrometer 1*User Manual