REC (record mode)store minimum and maximum readings over a measurement period. AC/DCmanually select AC or DC measurement function. Continuity buzzer and diode testtoggle between continuity buzzer or diode test on Ohm function. RANGEmanually select the appropriate range. LCD Display4,000 count with 42 segment bar graph. Continuity Buzzer and Diode TestToggle between continuity buzzer or diode test on ohm function. HIGH RESOLUTION DCmV RANGEAdditional 40 millivolt range with 0.01mV resolution for improved accuracy when performing low voltage measurements. ACV (AC Volts)Measure the voltage of ABS wheel sensors. DCV (DC Volts)Measure the voltage of circuits and sensors. Hz/Duty (Duty Cycle)Measure in percent the ON time of sensors or other devices. REL (Relative Mode)Factor out lead resistance for improved low ohm measurements or compare readings to a known standard. Can also be used for differential measurements. HOLDLock the reading on the display for hard to read locations for future reference. OHMS/RESISTANCEMeasure the resistance of spark plug wires, coils, sensors, and continuity of wiring. AC/DC Current Functions (Amps)Measure the parasitic draw from the battery with ignition off. Hz (FREQUENCY)Measure the frequency of sensors and signals. CAP (Capacitance)Measure the capacitance of condensers or capacitors found in today's hybrid automobiles. TILT STANDIs built into the instrument housing. SEPARATE FUSE/BATTERY COMPARTMENTIs easily removed for battery/fuse replacement. Fuses are labeled with replacement number. 7 year Limited Warranty. Technical and Service Hot Line: 1-888-382-6522. Manually select AC or DC measurement function. AC/DC Current functions: measure the parasitic draw from the battery with ignition off.