The heir-apparent to the CMD EX-3 and EX2+1, the X-Pander 3 opens up a wealth of expansion options for your Commodore 64, SX64, C128, or C128D.  Utilize multiple cartridges at once, or easily switch cartridges without removal.  The X-Pander 3 offers the following features:
3 individually-selectable expansion ports
power indicators for each port
Ability to swap IO select lines on 2nd and 3rd ports
easily accessed piano-style configuration switches
top-loading or back-loading 3rd port.
3rd port can accommodate 2 cartridges at the same time*
reset switch
* Both top and back-loading options for port 3 share  a single set of configuration switches, requiring 2 cartridges that can coexist without configuration.