Features and Benefits:

• Digital display- bright LED's indicate the voltage and test results
• Automatic test- The load is turned off, by internal relay, automatically after 10 seconds, audible beep notifies you when the test is complete
• Unit indicates "CHG" if the pre-test state of charge is not sufficent for proper battery testing
• Internal 100 Amp loading capacity

Controlled by microprocessor, simply activate the switch once and then it applies a precisely timed 10 second load to the battery.  The test results, "OK, Weak or Bad" are then displayed along with the test voltage, until the unit is disconnected.  This also tests charging voltage and relative starter current draw.