PROTECT WORK SURFACES -Pinless moisture meter comes with no pins on, so your walls and projects can be undamaged from pinholes, scuffing and scratching to figure out their moisture levels EASY TO READ AND USE- Moisture meter has Big backlit LCD screen and a 3-color LED bar graph, HOLD button, auto power-off function, out of range alarm and low battery, 9V battery included FIRST STEP IN MOLD PREVENTION - by checking suspicious water stains with a moisture tester around the house, You can determine whether the area is wet (a perfect breeding ground for mold) or has long since dried VISUAL AND BLE ALERTS - if youre looking for the source of a leak behind your work surfaces, listen for the high pitch tones to give you an accurate read on where moisture is most concentrated or quickly see using the tricolor LED moisture indicator WHY CHOOSE -- tools are known for their affordability, quality and reliability. So reliable, that we back this wood moisture meter with a 3-year-replacement-warranty. If it lets you down, well replace it. No questions asked.