This digital humidity and temperature meter features: High , quick response and high stability, can measure the temperature and humidity of the local environment for further analysis. This unit has been widely applied in household intelligent estate, subway, shopping mall for process control. Feature: 1. Measure current illumination 2. Measure difference value , MAX value and MIN value 3. The measurement range is ( 0-200000 ) Lux , auto switchof measurement gear 4. Setting of automatic power off 5. LCD backlight display 6. Data HOLD Technical Parameters: 1. Temperature range: -10~60°C(14~140°F) 2. Humidity range: 10~100%RH 3. of temperature: +1°C 4. of relative humidity: +5%RH 5. Power supply: 3x1.5V AAA battery( Battery not included) Notes: 1. This product has been calibrated before loading, do not change the parameters without the presence of professionals and equipment. 2. Amendment and maintenance must be by professionals. 3. Clean the unit with cloth only without any solvent or liquid. 4. Take out the battery if the unit is expect not to be used. size: Material: ABS colour: Black Package Contents: 1 x Luxometer 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.