Features: 1.Light,temperature and humdity measurement 2.Lux and Fc unit switchable 3.Celsius and Fahrenheit switchable 4.Auto range 5.Large LCD with Backlight 6.Data Hold Function 7.Min/Max/Avg Function 8.Detachable Sensor 9.Low Power Consumption Specifications: Light measure range: 0.1 to 200,000 Lux(Fc switchable) Accuracy:¡¨¤4%(0.1 to 10,000Lux);¡¨¤10% above 10,000Lux Resolution:1 Lux/0.1FC Sampling:0.5sec Temperature range:-10~50oC(14 to 122oF) Accuracy:¡¨¤1oC/¡¨¤1oF Humidity range:20%~90%RH Accuracy:¡¨¤5% Operation temperature:0 to 50oC(32 to 122oF) Operation humidity:10 to 90%RH Storage temperature: -10 to 60oC(14 to 140oF) Storage humidity:10 to 75%RH Size:220*55*35mm Weight:220g(included 9V battery) 53X31X36CM/CARTON 30PCS/CARTON 10.72kgs/CARTON