DMM Digital Bench Top Multimeter PC Analog Bar Meter Main Display: 80000 - Secondary Display: 80000 - Analog Bar Graph: 23 segments, update 40 time/sec More than 50 measuring functions including DC/AC Voltage, DC/AC Currents, Resistance (), Capacitance, Frequency (Hz), Temperature (C/F), Duty Cycle, Diode & Continuity Check Single Analyzed: measure synchronous: (AC+DC), (AC+Hz), (DC+dBm), (dBm+Hz), (Hz+Duty) ; Display synchronous: (C+F) Storage Temperature: -10 ~ 40 C; Storage Humidity: below 80% RH 16 Frequency points, 1% to 99% duty selectable square wave output