Specification: Material: Surlyn Resin + Synthetic Rubber + LED Ball color: white LED color: Random color Diameter: approx 42.6mm / 1.68 inches Each time bright 6-8 min Total LED service life: approx. 48 hours Quantity: 6 pieces Package includes: 6 pieces LED golf ball The golf ball has built-in LED lights, which are brighter and more dazzling than ordinary balls. When you hit the ball, the ball will be light instantly, and the sky will appear beautiful and dazzling arc. Even if the ball falls far away, the light of the LED lights is very dazzling. Let you find the ball easily. The surface color is represent the glow color, For example, the surface color is blue, When you hit it ,the balls will bright blue .This can make you to better distinguish each ball colour. You will find your best color when you need it.