Mini Expander and Aux Expander can both be connected to the main module at the same time.
-Adds VC for the 4 channel inputs
-Direct outs plus a stereo return jacks allow you to configure your own aux send system using other VCAs (like a Linix module or uVCA)

• 0 mA +12V
• 0 mA -12V
• 0 mA 5V

No info about availability.