The CA-323 transformer adaptor serves one purpose: It simply adapts 1/4" Hi Z signals to Balanced XLR signals.
This is a professional grade adaptor, which is fully compatible with standard 3 pin XLR connections and 1/4" TS connections.
One screw each holds the male and female contact assemblies in the body.
The connections are Male XLR and Male 1/4" TS.
An intended application for this adaptor would be to plug a piano directly into the XLR input of a snake or board.