Special Features:

Lens engraved with legend roll rate ccw; major components: light module 1, lens plate 1, display screen 1, color filter 1

Properties:

Two or more different types of items having a common mounting or mounted on each other which together forms a portion of a switch but which in itself is not a complete functioning item and cannot be assigned a more definite item name. See also switch section, rotary and contact assembly, electrical.