Meter indicator for belts: 5 digits + 2 decimals. Digit’s height: 8 mm – shaft D.7 mm – right or left drive. Zero-setting push button. Revolution: 0 = clockwise, S = anti-clockwise. Maximum speed: 50 meters per minute. Dimensions: 92x80x50. Adds in one direction of rotation and subtracts on the opposite. Ratio 1:20, 50 mm drum developing (2 revol. = 1 meter).