DURABLE QUALITY AND PREMIUM MATERIAL:6 Standard golf balls of constant light up for no less than 8 minutes, diameter 42.67mm weight: 45G,Three-layer golf balls are made of soft and elastic materials, which firmly protect the built-in LED light and make it hard to be damaged. It extends the life of the LED light(total life time is 50 hours) Brightly Flashing on Impact.Especially When You Hit Out Balls,will Shows One Beautiful Arc in the Sky. DISTINGUISH BALL EASILY:The logo of different color allows you to better distinguish each ball colour. You will not need to hit the ball to find the color you want. HOW TO USE: When the ball is hit hard on the floor, the 2 LED lights inside the golf ball will glow at the same time. The lighting time is around 8 minutes per time, which makes you have enough time to pick them up. After 8 mitutes , the light will be extinguished, hit again, and light up again. International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.