AC Voltage Mode Contact the probe tip to a circuit, the LCD display will read the max and min voltage, frequency and display the signal waveform in real-time. DC Voltage Mode Contact the probe tip to a circuit, the LCD display will read the DC voltage. PS100 can supply battery power or ground by pressing the rocker switch. Resistance Testing Mode Probe measures resistance, LCD shows result. Auxiliary ground lead connected to other end. Also functions as continuity test. Activating Components Touch probe tip to bulb positive, connect ground to negative. Press up for positive output, down for negative. Autel PS100 PowerScan Tool is the most revolutionary circuit tester to date. Featuring AVOmeter, test light, built-in flashlight, short circuit indicator, relay/component tester, continuity tester and bad ground indicator, etc. Powerful and affordable, it's an essential tool for every technician. Previous page Next page 1 40FT Extra Long Cable 2 For All 6-30v Devices 3 Do More Than A Multimeter Previous page Next page 1 Ideal Gift 2 Package List