Item Type: Battery Isolator Material: ABS Continuous Current: 140A Intermittent Current: 170A Delay Time: 5 seconds Application: This battery isolator is small in size and can be used almost anywhere, suitable for ATV, UTV, boats, RVs, maritime vehicles, trucks, and caravans. Package List 1 x Relay 4 x Screw 1 x Terminal 2 x Washer 2 x Nut 1Possess a voltage sensitive chip, which cuts in at 13.3V and cuts out at 12.8V to ensure that the main battery is ready for vehicle operation at any time. 2The dual battery isolator kit enables your accessories to run from a separate battery when your vehicle's engine is not running. 3When charging, the two batteries can be charged together, but the discharging between the batteries does not affect each other. 4The shell is made of ABS material, which is resistant to impact and corrosion, and can be used for a long time. 5This battery isolator is small in size and can be used almost anywhere, suitable for ATV, UTV, boats, RVs, maritime vehicles, trucks, and caravans.