Features: Easy to find & fun night,the glow in the dark golf balls are very bright, you will have a-lot of fun when play them at night. our led golf balls are easy to find when playing golf at night, also suitable for indoor and outdoor. Longlasting light up ball,constantly on (not flashing)-the-golf ball will stay-lit for 5-8 minutes after every activation. it is quite enough time-for your collecting them back, less balls being lost! the battery lasts 50-60hrs. Easy to use,no charger needed,no uv flashlight needed. just-hit the ball and it lights up on impact and creates a colorful arc-as it flies-through the air. Perfect gift idea,this is the best gift for your-parents, friend or children. give them a birthday, christmas or thank you gift, let them know what you appreciate, and they will like-it-and get a-lot of fun from it. There are 7colors optional,you can choice follow you like. Specifications: Material: Ball Core:Synthetic Rubber Outer:Cover Surlyn-PC Color:White,Yellow,Red,Green,Blue,Pink,Mixed Note: Please allow 1-2cm errors due to manual measurement. Due to the difference betweeen different monitors,the picture may not reflect the actual color of the item. Package includes: 4 Pieces Luminous Golf Balls