Product Name: Screen Brightness/Luminance Meter (SM208) Model NO.: SM208 Trademark: BESTONE Transport Package: Carrying Case Specification: CE, ROHS Origin: China Product Description Features:* Adopting a detector powered by a silicone photocell with high stability, photostability, and shock resistance, strict vision correction and accurate photometric measurement can be realized.* With a wide measuring range, it can measure between 0.01-39990cd/m2 without a dimmer.* It is a digital display with good indication reproducibility, data latching and peak value latching functions;* With very low power consumption, it can operate continuously for 100 hours on a 9V layer-built battery;* Mini light probe, measuring angle <10 degree* Compact, portable, easy to use.Specifications:* Measuring range 0.01-39990cd/m2* Measuring distance ≤ 1m* Object size ≥ 20, increasing with the increase of measuring distance* Precision:≤ +0.5% of the measured value +1 figure* Indication error:≤ +0.5% of the measured value +1 figure (relative to NIM standard)* Spectrum response characteristics:In accordance with the standard of national grade I illuminometer* Linearity error:≤ +0.2% of the measured value +1 figure* Temperature characteristics:≤ +0.1% of the measured value +1 figure* Operating environment:Temperature: (0-40)° CRelative humidity: ≤ 85%* Dimensions and weight: 149X71X41mm3* Power supply: 9V layer-built battery (model 6F22)