The Extech EX503 offers a variety of must-have multimeter measurements, including capacitance, frequency (with dual sensitivity for electrical and electronic applications), diode test, and continuity test. Other features include data hold and relative hold, as well as manual or auto-ranging. The latter automatically adjusts the measurement range based on the detected source, such as electrical components and electronic devices. The multimeter features 0.5 percent accuracy and a CAT IV 600-volt safety rating that protects users even when wired outside. It includes dual-molded test leads, a magnetic hanging strap, a 9-volt battery, a carrying case, and a user manual.