Length: 11.13 in.(810, 811, 820) Line Frequency 50-60Hz (810, 811, 820) Relative Humidity ≤ 76% (810, 811, 820) Specifications for 810/811/820,310 810/811 Designed for professional applications. Features: • Compact and convenient. • Both the 810 and 811 measure print processor control strips and negative control strips. • Simultaneous ...