Specifications: You can view the recent temperature andhumidity records on the APP , and the histogramand curve graph provide a clear data change trajectory . Range Temperature: -10°~50°c (14°F~122°F); Humidity: 20%~99%RH Accuracy: Temperature 0.1°c (0.1°F); Humidity: 0.1%RH Error: Temperature: ±0.5°C (±32.9F); Humidity: ±5%RH Power supply specifications: 1 3V CR2450 button battery (included in the factory) Wireless connection type: Bluetooth APP: Tuya Smart Material: ABS colour: White Package Contents: 1 x Temperature and hygrometer 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. Description: [Mini temperature and humidity Monitorwider range of use] Our temperature and humidity sensor is mini-sized andweighs only 21g, saving space. And it comes with a lanyardso you can hang it anywhere you want [Long Standby] The greenhouse thermometer and humidity have a built-inbutton battery CR2450 , which is and has a service life of 8-12 months . The APP displays the battery level in real time [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 -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