I purchased a new OGC-3D tuner on AliExpress. It arrived fine. This version has a built in Lithium 3.7V battery. I charged it up, it turned on immediately; however, the multi position switch on the front does NOTHING. I cannot even turn the unit OFF. If someone out there has one I'd appreciate a note on what the switch does and how to turn this thing OFF. :-(.
The display does light up and stays in the same display all of the time displaying: PWR=,C=, SWR= and L=, with numbers to the right of the = signs. But moving the switch to any of its 4 positions has no effect, nothing on the display changes.
Glen, WB4KTF.