Battery Powered Yellow Golf Ball These Golf Balls are so Fun & they work so good! - An Absolutely Amazing Glowing Invention! These are the best LED golf balls that we have ever seen. Very Bright, Official Size & Weight. Battery Powered. Features: Battery Powered Impact Activated Very Bright - High Quality LED Lights Uses Smart Electronics (Shuts off after 8 minutes with no impact) IMPORTANT: Smart Electronics also Reset the Timer every time you hit the ball to a fresh 8 minutes. Cheaper LED golf balls do not have this feature, and balls get lost left & right. Use Over & Over Again - they seem to last forever when you have a bunch of them! Estimated 300 + Hits until its just a golf ball Highly Recommended - You will be impressed 1st time you even bounce the ball & feel how authentic is really is. Here's how they work: Impact Activated, as soon you hit or bounce the golf ball bright LED lights illuminate the golf ball making it look like a shooting star at night & is very cool to see in person. They use Smart Electronics which turns LED Lights ON when the golf ball is impacted, and stays on for about 8 minutes, then shuts off until hit again.