Features: 1.Function : Measure the Brightness of Fluorescent Screens and Transmission Screen, it has wide applications in the TV sets area 2.Powered by a Silicone Photocell, the light detector possess high photo stability and good shock resistance, this item can achieve accurate photometric measurement 3.A Wide Measuring Range of 0.01-39990 cd/m2, it has 4 optional measuring range 4.Low Power Consumption: It can work constantly for about 100 hours on a 9V battery (not included) 5.Speciality: Compact and portable, it’s easy to use Specification: Measuring Range: 0.01-39990 cd/m2 Measuring Distance: ≤1m Accuracy: ±0.5%+1 Spectrum Response Characteristics: Linearity Error: ±0.2%+1 Temperature Characteristics: ±0.1%+1 Working Environment: 0~40℃, ≤85%RH Power Supply: 1 x 9V 6F22 battery (Not included) Color: Shown as pictures Size (Approx.): 16*8*4cm / 6.30*3.15*1.57in Weight: Approx. 868g / 30.6oz Packing list: 1 * Screen Luminance Meter 1 * Black Bag Note: 1. Due to the difference between monitors and light effect, the pictures may not reflect the actual color of the item. 2. Please allow slight error due to manual measurement. Thanks for your understanding.