Smart Outdoor Temperature and Humidity Sensor -20-70 Detection Range Mobile App Remote Monitoring 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 (must be purchased 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 helps you monitor real-time temperature and humidity changes, supporting smart features like remote monitoring and temperature and humidity graphs. High Accuracy Thermo-hygrometers always provide 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 sensor has a built-in CR2450 button battery, which is durable and has a lifespan of 8-12 months. The app displays the battery level in real time. Data Display You can view the latest temperature and humidity records in the app, and the histogram and curve chart provide a clear data pattern change. Package Includes: 1*Temperature and hygrometer 1*User Manual