Electro Luminescent Rainbow Shutter Shades have 3 modes: flash, slow flash, and steady on. EL wire lines shutters and the arms of the sunglasses. The back of the glasses are black plastic. EL wire colors: Purple, White, Dark Green, Red, Blue, Yellow, and Lime Green. Shutter Shade Width: 7.25″ Cord that runs from sunglasses to inverter is approx. 35″ long. Electro Luminescent Rainbow Shutter Shades use 2 AA batteries. Batteries not included and are sold separately.