An easy to use digital moisture meter designed to measure moisture in wood and building materials. This handheld meter can test levels in sawn timber, plaster, concrete, mortar and many other hard materials. Great for science experiments at schools, or for building inspectors and the handyman looking to monitor damp or moisture ingress around the home. Supplied in a zip up canvas pouch. Requires 9V battery. Features Use on wood, wall board, sheet rock, cardboard, plaster, concrete, mortar and more Big backlit LCD display Replaceable electrode pins 2-in1 Digital LCD readout and analog bargraph Simultaneous measurement, display of moisture and temperature readings Materials selection measurements MAX/MIN/DATA hold Auto power off Instructions Specifications Electrode length: 10mm (replaceable) Moisture Range: Wood: 1~70% RH Building materials: 0.1~2.4% RH Moisture Accuracy: Wood: 0~3%: ±1% 30~60%: ±2% 60~70%: ±4% Other Materials: ±5% Temperature Accuracy: 0~50°C/ 32~122°F; ±1°C/°F Auto Power Off: Meter shuts off automatically after 30 seconds of inactivity Power Supply: One 9V "6F22" battery Operating Temperature: 0~50°C/32~122°F Operating Humidity: 0~85% RH Size: 163 x 62 x 30mm Weight: ± 153g (with battery)