Usage Tips:1. Wood mode: In order to measure the humidity of wood, 4 kinds of wood can be . 2. Paper mode: used to measure cardboard, carton, etc. 3. Wall mode: for measuring walls, floors, building materials, etc. Specification: Power supply: 2 X AAA batteries (not included) Wood range: 4-75% Paper range: 4-90% Wall range: 0.2-24% Resolution: 0.1% Accuracy: 0.5% Automatic shutdown: after 5 minutes Material: plastic colour: As Shown Package Contents: 1 x Wood Moisture Meter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.