Voltage:6/12V Fixed load current: 125 amps. Voltage accuracy: ±0.2V Load test capacity:125amps, 500 to 1000 cold-cranking amps Display Meter: Analog, 0-16VDC (maximum) Test Cycle: 10 seconds per test with 1 minute cool down; 3 tests in 5 minutes Surface treatment: stainless iron