The Triplett 2030-C Pocket-Sized Auto-Ranging AC/DC Digital Multimeter is a 3 3/4 digit (4000 count) pocket-sized digital multimeter with a built-in hard case. It offers a variety of measurement features including AC/DC Voltage, AC/DC Current, Resistance, Continuity, Diode Test, Frequency, and Capacitance. The ABS plastic housing provides impact and drop resistance in an ergonomic design, and the user-friendly Auto Power Off feature helps maximize battery life. An industry standard CAT II design provides resistance to damage from transient overvoltages in many settings. The Model 2030-C is suited for a variety of commercial and residential applications, including security, home theater, electrical, HVAC installations and more.