Features: 1.No Voltage Drop: Automatically combines two batteries when charging and isolates the two batteries when not charging. No voltage drops comparing to battery isolator diodes. 2.Lower Power Consumption: Optional storage mode allows zero power consumption when engine is off. 3.Voltage Sensitive Relay: Dual battery isolator ensure your primary battery is always charged and ready to start your vehicle. It's like having two separate power sources for each battery while only having one alternator. 4.Stable Performance: This dual battery isolator is also built to withstand extreme weather environments, vibration and waterproof. 5.Easy Installation: No alternator or ignition connection needed,You don't need any additional components to complete installation as everything is included in the kit, including leads, connectors, screws, and more. Specification: Item Type: Dual Battery Isolator Kit _x000D_ Material: Plastic+Metal_x000D_ Nominal Voltage: DC 12V_x000D_ Combine Voltage: DC 13.3V_x000D_ Open Voltage: DC 12.8V_x000D_ Continuous Rating: DC 125A_x000D_ Intermittent Rating: DC 140A_x000D_ Power Consumption: 10mA (Standby), 330mA(Engage), 0mA (Storage)_x000D_ Terminal Studs: M6(1/4in)_x000D_ Red Cable Length: Approx. 600mm/23.6in, 300mm/11.8in_x000D_ Black Cable Lengt: Approx. 300mm/11.8in PackageList: 1 x Isolator 1 x Cover 4 x Screw 3 x Terminal 4 x Sheath 2 x Manual 3 x Cable