This intelligent wood moisture meter with 2 pins and can measure the moisture content of types of wood or floor damp humidity percentage to find the slow leak Digital Wood Moisture Detector Meter Moisture Detector for Firewood Bamboo Ware Use the wood humidity meter to select appropriate wood for construction material, furniture material, and fireplace light fire This wood water content meter can also use to detect slow leaks on wood roofs or floor. 4 Wood Species: A: Teak, Walnut, Afrormosia, Rubber Tree, Imbuia, Kokrodua, Nuove Bidinkala, Cork B: Keruing, White Poplar, Beech, Cedar, Tola C: Lauan, Ash, Elm, Fir, Maple, Padauk Oak, Cherry D: Basswood, Larch, Pine, Birch How to Use It Step 1: Install battery and take off the wood meter’s protection cap, then press “power” button Step 2: Press “ Mode” to select correspondingly wood type (please refer to the manual to know the measured wood categorized) Step 3: Push pins into the wood, and screen show the reading Step 4: Wait for the reading value stability, press "Hold" button to freeze the measured value. Step 5: Pull pins out and record the reading. Specification: Range: Wood 0-99.9%, Accuracy: ±0.5%, Resolution: ±0.1%. Display: Large LCD characters display Measurement principle: Electrical resistance Electrode length: 10mm(0.4") Electrode pins: Integrated Auto Power OFF: After approx.15 minutes when no any operation. Meter housing: ABS plastic Operating Temperature: 0 to 40 ?(32 to 104?) Dimensions: 145 X 67 X 32mm (5.7" x 2.6" x 1.3") Weight: 200g (7.0 oz) Package Included: 1 x Moisture Meter 1 x 9V battery 1 x English User guide. NOTE: Any quality problem, please don't hesitate to contact us and we will solve your problem asap.