High Accuracy Professional 4-500Ah 2V 6V 12V Electronic Device Battery Tester Automotive Car Battery Tester Precision Instrument Battery types: lead-acid batteriesBattery Specifications: 2V, 6V, 12VMeasuring range: 10Ah - 240Ah (hours) FY-54Measuring range: 4Ah - 500Ah (Ah) TY-64Discharge current: 10A (A) 2V battery 30A (safety) 6V battery 60A (safety) 12V batteryCapacity Color Code: Red Zone: The battery has been discharged should be immediately charged Yellow area: The electricity is insufficient, it should be charged immediately Green area: sufficient power can be used normallyMeasurement time: <3s (seconds)