The Instek GDM-357 Handheld DMM is a compact, high precision, battery operated multimeter designed to meet most of the daily needs for design engineers as well as service engineers. The GDM-357's design is driven by mobile-oriented features, such as automatic power down to preserve battery life, a large backlight display for crisp viewing, a rotary selector switch and clear-cut push buttons to ease operation. The basic functions match the depth of bench-top multimeters. This compact, reliable, and economical device is ideal for any engineer.