1. Easy to install. 2. Rated current: 100A 3. Instantaneous current: 300A 4. Installation position: battery negative 5. Function: Protect the power supply from leakage. 6. Working status: Tighten the cover 4-5 circles to make the circuit in the power-on state, loosen the cover 4-5 circles to make the circuit in the power-off state. 7. Voltage range: DC12-24V