Nite Ize MTLP-08-07 MeteorLight K-9 Led dog ball, Disc-O Enter your model number above to make sure this fits. Compact high-strength body Spring-action rollers hold flashlight securely Gold plated contacts prevent reverse charging Easy on off by pressing and holding switch Size of a tennis ball fits most ball launchers Water resistant and it floats Replaceable batteries Disc-O color cycles through color spectrum