The subject gear provides a 2-channel XLR Audio interface with phantom power, channel metering, headphone amp, and limiting for use with DSLRs. It also works with camcorders that allow for external mic input. At $100 the cost is reasonable and it strikes me as superior to many common alternative adapters. A few more details are in:
https://www.dvinfo.net/forum/canon-xa-vixia-series-avchd-camcorders/537106-hf-g-40-pmd-602a.html?537106=#post1954467