General description Made of engineering plastic, this digital height gauge is durable and designed for a long service life. It features a magnet on the standing feet, allowing it to hold firmly on ferromagnetic surfaces. This dual-purpose gauge can measure both the height of an object and the aperture depth. Technical specifications Measurement range: 0-80mm Units supported: mm, inches, and fractions Battery required: CR2032 3V (not included) Usage Switch between absolute (ABS) and incremental (INC) measuring mode using the "INC/ABS" button.