Protimeter Digital Mini BLD5702 Instruction Manual page 7

Measurements:
The numeric measurement and color LED will be shown as well
as the "DRY" (green) or "AT RISK" (yellow) or "WET" (red),
based on the measurement shown.
7-16.9 DRY (Green), 17-19.9 AT RISK (Yellow), 20-99.9 WET (Red)
Protimeter Digital Mini Page 5