I keep reading that displays are paired to controllers. Can you change one king meter for a newer king meter? I see the new ones look really nice and have usb out on them.
Have you any with USB charging ?I am not sure.
We have different programs to load into the different King Meter LCDs.
For the kits, we have the program for the KM J-LCD that is well trusted for many years and the newer KM 529 LCD.
KM 529 LCD: