Shure
In-Line Preamp RPM626
48V TA4M-XLR
Specifications
In-line preamplifier for WBH53, Beta 53, Beta 91, Beta 98, MC50B, WB54, PGA31, and MC51B microphones boosts resistance to RF interference.
https://www.shure.com/en-US/products/accessories/rpm626?variant=RPM626