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 The TUYA Bluetooth Thermometer Hygrometer can help you monitor the changes in temperature and humidity in real time, supporting smart functions such as remote monitoring and temperature and humidity graphs High accuracy The thermo-hygrometers always provide you with the latest and most accurate temperature and humidity changes. Temperature accuracy (error value) is 0.54F / 0.3C, and humidity accuracy (error value) is 3% RH Long standby The greenhouse thermometer and humidity has a built-in CR2450 button battery, which is durable and has a lifespan of 8-12 months. The APP shows the battery level in real time Data display You can see the latest temperature and humidity records on the APP, and the histogram and curve graph provide a clear data change trajectory. Package contents: 1*Temperature and hygrometer 1*User manual