Features: Adjustable for 4 tree species. Reading lockable. Auto temperature compensation for environment varying. Maximum moisture reading review. Backlight on/off switch. Applying CPU technology for accurate measuring. 2 pcs of AAA battery for power supply with battery icon for indication of power. Large LCD. Automatic turn-off if there is no further operation within 120 seconds while manual turn-off can be performed. Able to measure the environmental humidity and temperature. Compact and fine design with solid and light plastic material, Portable and easy operation.