dual battery isolator kit - 12 volt 140 amp voltage sensitive relay - complete vsr double battery automatic charger - fits trucks, suv, atv, utv boats and more - safe, water and vibration resistant aa ignition the dual battery isolator kit enables your accessories to run from a separate battery while the engine is not running on your vehicle while keeping your main battery charged and your vehicle always ready to go and start when you want it to. this dual battery isolator kit features 12 volt 140 amp voltage sensitive relay isolator and includes all the bits and pieces needed for a complete installation. being the computer age that it is today, a lot of accessories, tools and gadgets that runs on electricity are essential in our everyday living or hobbies. this dual battery isolator kit with printed installation instruction manual gives you the power for your recreation without needing to worry about getting home after. includes the following bits and pieces: red 20 ft battery cable black 2 ft ground cable brass marine type battery terminals tinned copper lugs heat shrinks cable ties printed instruction manual