2-Slot Extension for Bento 2 Pure Analogue 2-Slot rack for modules of the API 500 system Reduced cabling effort, as audio routing can be switched at the rear panel Compressor link switch Intelligent voltage distribution Energy-efficient Power supply through base unit Bento 2 Pure Analog art. 566203, not included 2 Inputs: XLR 2 Outputs: XLR Power-Link connector for power supply of Bento 2 Pure Analog Design: Desktop Note: The Fredenstein Bento 2 Pure Analog base unit is required for operation. Please note that I bought this unit thinking it was a stand alone unit, but the Fredenstein Bento 2 Pure Analog base unit is required for operation. If it is the case that you have this unit already it will give you an extra 2 slots of 500 series unit power/connectivity.