The Chuckit!® Max Glow® Ball gives dogs something to jump for. This durable rubber ball glows in the dark to allow the game to keep going when the sun goes down. It charges quickly under any bright light taking just five minutes to generate 20 to 30 minutes of glowing playtime (no batteries or cords needed). Easy to clean and dogs will love this textured grip-able rubber ball made just the right size to use perfectly with the Medium Chuckit! Sport Launcher (sold separately).PRODUCT NOTE: We recommend that dogs are supervised during playtime and remove the toy from the dog if it becomes damaged or parts become separated. Discontinue use if the toy is damaged. No dog toy is indestructible; and every dog interacts with its toys differently. Supervised play will go a long way toward helping toys last longer.