The 550 SERIES DIGITAL MULTIMETER features powerful automotive test functions such as; Frequency, Duty Cycle, Diode & Continuity Tests, plus all the standard meter features you expect in a professional grade Multimeter. Diode Test Min/Max Mode Capacitance Duty/Frequency Continuity Test Auto Range Data Hold Relative Change Auto Power Off Frequency: 1Hz 10MHz 0.1% Duty Cycle: 0.1% 99.9% 2.5% DC Volts: 400mV/4/40/400V 0.5%, 1000V 0.8% AC Volts: 4/40/400V 0.8%, 400mV/750V 1.2% DC Amps: 400/4000_A 2%, 40/400mA 1.5%, 4/10A 2% AC Amps: 400/4000_A 2.5%, 40/400mA 2%, 4/10A 2.5% Resistance: 400_/4/40/400k_ 1%, 4/40M_ 2% Capacitance: 40nF 3.5%, 400nF/4_F/40_F 3%, 400_F/4000_F 20% Dimensions (H x W x D): 17.7cm (H) x 8.8cm (W) x 3.9cm (D)