Nite Ize Flashflight Disc Golf Light Up LED Putter Unique Disc-o Select 7-color selection feature: Red, Purple, Blue, Aqua, Green, White, and Disc-o (color changing) options Patented LED & fiber optic technology. Water-resistant - they float! 20 hour run time. Push button on/off switch Easy replaceable 2 x 2016 3V lithium batteries included Weight range for each disc: 5.9-6.2 oz | 169-175g