Features Possess 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. The dual battery isolator kit enables your accessories to run from a separate battery when your vehicle's engine is not running. When charging, the two batteries can be charged together, but the discharging between the batteries does not affect each other. The shell is made of ABS material, which is resistant to impact and corrosion, and can be used for a long time. This battery isolator is small in size and can be used almost anywhere, suitable for ATV, UTV, boats, RVs, maritime vehicles, trucks, and caravans. Specification:Item Type: Battery Isolator Material: ABS Rated Voltage: 12V DC Continuous Current: 140A Intermittent Current: 170A Cut-in Voltage: 13.3V Cut-off Voltage: 12.8V 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 Relay4 x Screw1 x Terminal2 x Washer2 x Nut Note: Package List 1 x Relay 4 x Screw 1 x Terminal 2 x Washer 2 x Nut