Capacitance meters are instruments that measure capacitance, the ability to store an electric charge. They are used to test, inspect and sort ceramic and other types of capacitors on production lines. In addition to frequency, capacitance meters are specified according to measurement parameters. Product specifications also include display range, test voltage, accuracy, measurement time, compensation, interface types, and functions. Some capacitance meters have two measurement speeds: short and long. Short-mode devices provide capacitance measurements more quickly, but are not accurate as long-mode capacitance meters.