Thermometer 10 inches in diameter ,used acrylic as interface and with black bold numbers inside which make it easy to be read the temperature value from long distance.This outdoor thermometer displays both Celsius,Fahrenheit and humidity. Accuracy is between -40 and 140/-40 to 60 ,Humidity measurement range 0 to (RH) to suit all climates.The hooks on the back and the waterproof design make the thermometer suitable for study,garden,patio and many other occasions.The product uses a plastic bottom case and an acrylic dial without any battery,no need to worry about the product will rust.The thermometer will calibrate automatically,After 2 hours,the pointer will match the local temperature automatically.SpecificationMaterial:Plastic bottom case,Acrylic lens,plastic dial aluminum pointer-Temperature measurement range: -40 to 60 (-40 to 140H)-Temperature resolution: 2 (C)-Temperature measurement error: /- 2 (C)-Humidity measurement range: 0 to (RH)-Humidity measurement accuracy: 2% (RH)-Humidity measurement error: /-7% (40% to 70%) (RH)-Dimensions Diameter: 250(mm)/10(in.)-Thickness: 33(mm)Note:Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.Package includes:-Thermometer / Hygrometer *1