Usage Tips:Features:Measuring range between -30 and 50C , Humidity from 20- RH.This thermometer hygrometer with 2 in 1 design, convenient for your daily use.With a mounting hole on the back of this thermometer you are allow to hanging it on the wall, or just put on your desktop.Analog thermometer with NO battery needed, save you the for time and money for changing batteries like other digital indoor thermometers.Accurate reading can help you monitor temperature and humidity instantly, the quality material makes it can be applied for a long for time. Specifications:Material: PVCDiameter: approx 127mm/5inTemperature measurement range: -30 ~ 50Temperature measurement accuracy: 2Humidity measurement range: 20%- RHHumidity measurement accuracy: 5%RH Note:Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes:1x Thermometer Hygrometer