Sharp and Penetrating Probe: The probe is extremely sharp and can easily penetrate hardwood and other solid objects containing moisture. 【Built-in Standard Test Resistor】 A protective cap houses the built-in standard test resistor for easy calibration. 【Direct Moisture Reading】 The measuring probe pierces the object to be measured to display an accurate moisture reading. 【Easy-to-Read Display】 The meter has a backlit color display for easy reading in all lighting conditions. 【Automatic Shutdown】 If there is no operation within 10 minutes after startup, the meter will automatically shut down to save battery power.