Usage Tips:Precise Monitoring: This high-performance digital thermometer and hygrometer ensures precise temperature and humidity levels. Ideal for a variety of enclosed environments, such as freezers and humidors Wide Range: The sensor is able to measure temperatures from -10 to 50°C, providing the flexibility needed for a variety of settings Compact and Versatile: The stylish round design makes it easy to place anywhere, while the clear LCD display allows for quick readings at a glance Fast Response: Humidity sampling cycle of 10 seconds Easy to Use: No complicated setup required. Simply place the sensor where you want it for instant readings Temperature measurement range: -10 to 50°C Temperature measurement accuracy: ±1 degree (at room temperature) Humidity measurement range: 10% to 99% Humidity display resolution: 1% Humidity sampling period: 10 seconds (1 minute) Humidity measurement accuracy: ±5% Rated voltage: DC1.5V Note: The humidity error of the product at room temperature is about ±5%, and the temperature is about ±1°C Colour:Black Material:plastic Package Contents: 8 x Digital Thermometer 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.