Adds iron volume and some other stuff. https://www.minelab.com/usa/vanquish-software-update-1
VANQUISH 540 Iron Volume Control
Detecting in heavy iron trash is enhanced with the new Iron Volume Control feature. 10-step adjustments let you decrease the volume of iron all the way down to a whisper, while leaving desirable targets (non-ferrous) loud and clear. To engage Iron Volume Control, simply hold down the All Metal button, while simultaneously using the Volume buttons to adjust to your liking.
General Improvements for All VANQUISH Models
The upgrade also includes improved battery handling capability for all models, as well as a new low battery alert.