This has three decks and can give you attenuation from 0 to 111 db in 0.1 db steps. Unlike the Hewlett Packard and General Radio equivalents each deck has 11 steps. The VH-795-G has 600 ohm input and output impedance. Very, very useful on the test bench.
Some mastering engineers use these (and the GR version) as precision level attenuators.