The CA-310 MXLR to MTRS is a basic barrel adaptor suitable to plug a FXLR connection in to one end and a female 1/4" TRS connection into the other end. This is handy if you have a XLR patch cable that you need to plug into the input of an effects device with a female 1/4" TRS panel jack.
Wiring: The 1/4" TRS connection is hardwired straight through to the MXLR connection with:
1) Tip of the TRS connection wired to pin #2 of the MXLR connection.
2) Ring of the TRS connection wired to pin #3 of the MXLR connection.
3) Sleeve of the TRS connection wired to pin #1 of the MXLR connection.
There's nothing really special about this connector other than it's inexpensive, and fully compatible with standard 3 pin XLR connections and 1/4" TRS connections. This is a solid built barrel adaptor suitable for professional applications. The body is nickel silver finished metal. The contact points are reasonably good quality spring steel.