Two measurement modes: Pin and pinless Pin mode uses replaceable pins at end of 46 in. cable; pinless mode uses integral ball sensor with 4 in. measurement depth Displays % WME or relative readings simultaneously on two displays: 0 to 99.9 count jumbo LCD, and 40-dot tri-color LED bar graph Auto-calibrating Data hold function User can turn beep sound, backlight and auto power off function on or off Low battery warning Spare pins storage compartment Measurement Range: 6.0 to 87.6% WME (Wood Moisture Equivalent) and 0.1 to 99 REL Measurement Accuracy (Pin Mode): ±3% of reading + 5 digits