Nite Ize Glowstreak Wild LED Ball - Disc-o - This rugged rubber ball features unique ridges that make for perfect gripping – whether in a hand, ball launcher, or muzzle. The ridges cause the ball to bounce in a wild new direction with each throw, keeping your pup engaged and focused for truly tiring play (so you can enjoy that post-play rest). The rubber shell encircles a protected inner core containing an innovative motion-activated module with color-changing Disc-O LEDs. The core also holds 2 easily replaceable, long-lasting CR2032 batteries for up to 35 hours of play. GlowStreak automatically shuts off after 10 minutes of inactivity to ensure the fun isn’t wasted. Ideal for bigger breeds, this molded ball is shockproof, waterproof, bite-friendly, and slobber-resistant—it even floats for those fur-ocious swimmers. Color-changing LED ball for day-to-night play Rubber ridges create unpredictable bounce pattern that keeps dogs engaged Fun, color-blending Disc-O LED pattern Grippy design allows for easy fetch Motion activated - bounce to turn on Auto shut-off after 10 minutes of inactivity (5 minutes of glow followed by 5 minutes of flashing) Durable rubber construction Waterproof - it floats! Run time: 35 hours 2 replaceable CR2032 batteries included