Features: Large-screen LCD display temperature and humidity Hygrometer memory function. Memory clear function. Celsius Fahrenheit conversion. Technical parameters: Temperature measuring range: -50 ° C ~ + 70 ° C (-58 ° F ~ + 158 ° F) Humidity measuring range: 10% to 99% Temperature measurement accuracy: ± 1 ° C Humidity measurement accuracy: ± 5% temperature Debate rate: 0.1 ° C, humidity resolution: 1% Size: 88.0 x 48.5 x 11.5mm Panel hole size: 88.5 x 49.0mm the operating instructions: Front MAX / MIN button to view the maximum or minimum temperature and humidity memory, In the MAX / MIN RESET Clear History button state maximum and minimum temperatures. ° C/ ° F switches used to select ° C or ° F two different temperature units Color: Black Material: plastic The product is shipped without batteries, you need to bring your own 1x LR1130 button battery Package Contents: 1 set of mini digital thermometer 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.