I have used this on my DFX & V3i. It works as it should. It will not run single frequency 22.5 on V3i.
My other one wont either. Happy to answer any questions. The item "Applied Creativity Bigfoot 18x3 Whites DFX/MXT Coil & Cover" is in sale since Saturday, April 18, 2020. This item is in the category "Business & Industrial\Test, Measurement & Inspection\Test Meters & Detectors\Metal Detector Accessories".The seller is "onearmwilly" and is located in Emlenton, Pennsylvania. This item can be shipped to United States.