SSEYL Landtek GM-026 Gloss Meter Glossmeter by Gain Express Measuring Geometry :20 & 60 Degrees /Store up to 254 groups of data with measurement conditions Range: 0.1~200 Gloss Units ; Gloss Units: GU ; Accuracy: 1.0GU ; Resolution: 0.1GU ; Repeatability: 0.5GU Measuring Area: 7 x 14mm ellipse / Data memorized: 254 groups / Data output: RS 232 C serial interface Working Condition: *Temperature range: 0~40C / *Humidity: up to 85% Power: 4 x 1.5V AAA battery (not included in the set) / Weight: about 300g (including fitted batteries)