It shows "mm" (a standard SI unit), but the units jumps from 40mm (approximately 1.6 inches) to 1 metre (approximately 3 feet).

Flipping between units the mm value and inch value aren't even close, out by an order of magnitude.

Flipping between units, it's clear that either there's a zero missing from the end of the number shown OR it is showing centimetres (a non-SI unit). Either way it's wrong.