Two Line El Wire Kit - Yellow, Green This el wire kit has 1 line of el wire 5 feet long with a 3-Mode battery pack. The 3-Mode Battery Pack lights up the el wire in three ways: Permanently On, Slow Blinking, and Fast Blinking. You switch the modes by clicking a button found on the battery pack. The size of the el wire is 2.3mm. The el wire comes soldered, so there's no work on your part to light up the el wire! The 3-Mode Battery Pack takes 2 AA Batteries.