2-in-1, with two dials that can display brightness and temperature. High precision sensor, quick test in 04 seconds. Small size, easy to carry. No battery required. Pointer light meter, thermometer<br><br>Light measurement range: 0-250,000LUX Temperature measurement range: -20-50℃ -10-130℉ Resolution: 1uW/cm², 0.01mW/cm² Accuracy Light: -/+10% -/+5% Sampling time 0.4 seconds. Application range: working environment (lamp light intensity), plant light, ambient temperature Working environment: -20-50℃ 7.Scope of application: work environment (Luminaire illumination intensity),Plant illumination, amblent temperature. This product does not require batteries. Illuminance: Optimal value: 200,000 lux-300,000 lux (In this range, the light is not glaring and bright, so bright that your mood is also sunny) Temperature: Optimal value: 23 degrees-28 degrees(Scientifically proven to be the most suitable and comfortable temperature for the human body) Tips: The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Colour:Photo Color Material:plastic<br><br>Package Contents: 1 x 2 in 1 Light Meter portable Thermometer<br><br>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.