Autel PowerScan PS100 Electrical Circuit System Diagnosis Tool Autel PowerScan PS100 Performs every type of service including power injection, measurement, ground testing, polarity checks, continuity testing and components activation Easy to read AVOmeter allows you to read voltage, current and resistance at the fingertip With a flip of the power switch, you have an instant hot/ground lead for powering up electrical components like cooling fans, relays, etc. Simultaneously uses the hot lead and the ground lead to activate components right in your hand Autel PS100 circuit tester contain 20ft (extendable) cable provides excellent accessibility to test along the vehicle