These brand new booster cables have a buit in light so you can see what you are doing at night. You can connect one end of the cables to the good battery and you wul,have a light to connect the other end of the cables to the dead battery. I clipped the cables to my 12 volt unitility battery to show that the light works. They came from an estate and will be avaibale nex week after Nov 4. Please email if you are interested.