These chassis furnish 16 switch points and hold up to 16 Form C
CXR/2×1 Switch Modules. Built-in front panel LEDs display switch
and power status. Add controls and switch modules to complete
the system.
Dimensions: 19″ rack mounting (483 mm)
15″ deep (381 mm)
3.5″ (2 RU) high (89 mm)
Weight: 15 lbs. (6.8 kg) max.
AC Power : 20 W max. – 115/230 Vac selectable.

link to switch module selector