These Chassis controls up to four 8×1 modules, eight 4×1 modules or mixtures of 8×1’s, 4×1’s, 2×1’s and 2×2 modules in any combination or configuration. LEDs on the front panel show switch and power status. Add Switch Modules and a Control Module to complete the system. Pushbutton manual control is optional.

Dimensions:
19″ Rack Mount (483 mm)
15″ deep (381 mm)
3.5″ (2 RU) high (90 mm)
Weight: 15 to 20 lbs (7 to 9 Kg) max
AC Power : 50 Watts max. 110/220 selectable.

link to switch module selector