CEM DT-9989 Multimeter with oscillometer is a Professional True RMS Industrial Digital Multimeter with oscilloscope functions that can measure AC/DC Voltage, AC/DC Current, Resistance, Capacitance, Frequency (electrical & electronic), Duty Cycle, Diode Test, and Continuity plus Thermocouple Temperature It makes much more safe measurements with double molded plastic housing design and IP67 waterproof function. It can store and recall data. It features a waterproof, rugged design for heavy-duty use.