【 4-needle 3-mode hygrometer 】 Wooden hygrometer with 4-needle type. Hygrometer with fast response and high accuracy. You can measure the amount of water in various wood/paper/walls and other materials in three modes. Press "PAPER/WALL" to switch the material mode of paper/wall. Different measurement modes correspond to different measurement ranges. Wood :4% ~75%, paper :4% ~90%, wall :0.2~24%.[4 Correct Measurement Modes] There are 4 modes, "A, B, C, D", which can make different wood fit in the humidity test. Simply press "Wood" and select the mode you want to improve your measurement accuracy. Users can choose groups that include more than 50 common woods. Resolution :0.1% Accuracy :0.5% Display resolution :±0.1%【 Small body & backlit LCD monitor 】 Backlit LCD monitors are convenient for measuring moisture in dark places. Press the "Hold" key to freeze the reading material, which can be measured more intuitively. Because of the durable ABS material, non-slip edge attached to the compact body and light weight, can simply carry the moisture meter into the pocket, easy to measure.【 Save Battery power 】 Use a battery with an automatic shutdown function. If the button does not activate within 5 minutes, you can save battery drain. If the battery balance on the meter screen becomes less, please remove the battery cover on the back of the meter and replace 3 new single 4 batteries (sold separately).It is an ideal measuring tool for home owners, carpenters, floor installers and inspectors to avoid potential problems with walls and wood. Keep the meter in a cool and dry place when not in use. If you do not use it for a long time, please remove the battery to avoid battery leakage or damage to the instrument.Product description:Homeowners and experts can rely on moisture meters to identify wall and wood hazards and check for future problems.Characteristics:Four needle wood hygrometer. Fast response and high precision.4 modes suitable for different woods in humidity test. Simply press "Wood" and select the mode you want to improve your measurement accuracy.Press the "Hold" key to freeze the reading material, which can be measured more intuitively.The automatic shutdown function can not be activated for up to five minutes to save battery consumption.It is an ideal measuring tool for home owners, carpenters, floor installers and inspectors, avoiding potential problems with walls and wood.