Professional Automotive DMM Another good choice for the professional automotive technician, the #590 puts the right capacities in your hands. . For example, the #590 can test the on-time of fuel injectors using the Ms pulse width test function.. This DMM is completely auto-ranging, making it an easy and efficient tool to use. . The #590 includes two sets of test leads, RPM pick-up, temperature probe, 9 volt battery, instructions manual and carrying case. . Inductive RPM pick-up features a five position, adjustable sensitivity switch. . Features. 48 Test Ranges, 15 Test Functions. Auto-ranging. Modern design, protective rubber boot and case are all one piece. Huge 2 inch high LCD display with backlighting, easy to see digits!. Ms Pulse Width for fuel injector on-time. Desirable 20 Amp fused test range. Auto Power-Off, saves batteries. Relative change function, Data Hold. Built-in Temperature readings. Includes zippered storage case 590 Prop65 information pending -