No More Guessing, EZ One Button Operation. The TPI 100 automatically switches between AC and DC Voltage as well as resistance measurements. No more guessing what range to switch your meter to. The TPI 100 does it automatically. Features of the Model 100: EZ to use one button operation Automatically Measures DC Volts, AC Volts and Ohms (Resistance) Large 4,000 Count Display 0 to 600 Volts AC and DC 10M Ohm impedance Auto Power Off After 10 Minutes Includes Test Lead Set, Batteries and Protective Rubber Boot 3 Year Limited Warranty The 100 comes complete with the following accessories: 100 Instrument Rubber Boot Test Lead Set Instruction Manual 1.5V Battery Model 100 Applications Measure line and control circuit voltages Measure resistance of motor windings, transformers, and solenoids Make general AC and DC voltage and resistance measurements Measure the resistance of elements and electric heater cores Test continuity of wiring Verify voltage at breakers and outlets Use as a back-up meter in your tool box