Description: Material: ABS Size: shown on picture Principle: Resistive Wood range: 4~75% Paper range: 4~90% Wall range: 0.2~24% Resolution: 0.1% Accuracy: 0.5% Electrode length: 10mm (0.4") Electrode needle: integrated Automatic shutdown: after the button is not operated for 5 minutes Power supply: 2 AAA batteries (not included) Operating temperature: 0 to 40 degrees Celsius (32 to 104 degrees Fahrenheit) Specification: Automatic shutdown function: This instrument has an automatic shutdown function. If the button is not operated within 5 minutes, the instrument will automatically cut off the power to save battery consumption. Care and maintenance: When the meter is not in use, it should be stored in a dust-free/shaded dry environment. If it is stored for a long time and will not be used, please remove the battery to avoid battery leakage and damage the meter. This instrument can measure the moisture content of more than 50 kinds of wood, suitable for various occasions to measure the moisture content of wood and the current ambient temperature. High quality, durable and reusable. 100% Satisfaction: Any further question about it, please feel free to contact us. includes: 1 xHumidity Tester( no battery)