The GlowStreak LED ball dog toy is the most technologically advanced nighttime fetch ball ever made. This robust rubber ball has a protected inner core that contains an advanced motion-activated LED module with bright red or colour-changing Disc-O LEDs, which turn on with a simple bounce. It also features an auto shut-off function after ten minutes without a bounce. The same size as a tennis ball and invincible to water or slobber, this tough little ball floats, and is great for dogs who love to swim. The unique grooved design on the surface creates a bite friendly exterior that is easy to pick up for small and large dogs alike. Powered by replaceable, long-lasting batteries, you can have up to 35 hours of backyard playtime with this GlowStreak LED Ball.