MFJ-4116P Bias T (pair)
Send up to 1 Amp DC and up to 50 Volts DC down a coax cable to power equipment (automatic antenna tuner, relay box, etc.) without running a separate power cable.
Requires one MFJ-4116 on each end of coax cable to inject DC power and to retrieve DC power. 1-60 MHz. SO-239 connectors. DC jack. 2 ¾" W x 2 ½" H x 1 ¼" D.