The REED R6018 is a dual-mode moisture meter that checks wood and building materials using either a pin probe or a non-invasive pinless scan. Pin mode reads roughly 5-50% moisture in wood (about 8mm deep), while pinless mode reads 0-99.9% up to 25mm deep on wood or materials like drywall, plaster, and concrete. It shows low/medium/high moisture levels with a rising-pitch audible alert, runs on a 9V battery, and includes auto shut-off and a low-battery indicator.