500 Amp variable load carbon pile tester, Colour-coded, temperature compensation pass / fail bands on the voltmeter, Separate voltmeter and amp-meter provide easy to monitor battery load tests., Tests batteries up to 1000CCA, Fully insulated, heavy duty, colour coded battery clamps & wire leads., Tests 12V batteries, alternators, regulators & starters., Built in warning beeper., Click here to download the Manual