Eliminates the need to disconnect the battery from the terminals while welding on a vehicle, Just clip the clamps across the battery and the green LED indicates complete electrical system protection, Fully insulated booster clamps with 2-function Antizap protection, Protects sensitive electronics, reduces labor time and pays for itself after one or two uses, Protects vehicle electronics during MIG, TIG, or Argon Arc welding. 12v antizap clamp-on surge protector.