[Smart APP Control] Tuya Bluetooth Thermohygrometer can help you monitor temperature and humidity changes in real time, and supports intelligent functions such as remote monitoring and temperature and humidity charts. [High Precision] Thermohygrometer always provides you with the latest and most accurate temperature and humidity changes. The temperature accuracy (error value) is 0.54F/0.3C, and the humidity accuracy (error value) is 3%RH [Data Display] Recent temperature and humidity records can be viewed on the APP, and the bar chart and curve chart provide a clear data change trajectory. Range:Temperature: -20-70(4-158); Humidity: 20%-99%RH Accuracy: Temperature: 0.2(0.2); Humidity: 0.1%RH Error: Temperature: 0.5(1); Humidity: 3%RH Power specification:2 x 1.5V AAA batteries (not included in delivery) Wireless connection type:Bluetooth Product size:126mm x 43.2mm x 26. 6mm APP:Tuya Smart Note:Due to different production batches, there are differences in printed labels, which does not affect usage. Colour:White Material:ABS Package Contents: 1 * Temperature and humidity sensor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.