Hanya untuk baterai / aki 12v Features: 1. Working Current: 5-15mA, the lower battery voltage is, the lower current. 2. Eight Power Resolutions: 10%, 25%, 40%, 50%, 60%, 75%, 90%,100%. 3. Voltmeter Range: DC 12-60 V 4. Voltage Meter Accuracy: 1% 5. Operating Temperature: -10 ~ +65