The GlowStreak LED Ball allows you to continue your game of fetch way after nightfall.__ A robust rubber ball with a protected LED light inside, it is perfect for after-hours walks. It turns off after ten minutes' inactivity, and turns on with a single bounce. __ Rivers, ponds and puddles are no problem: this ball is not only waterproof, it floats!_Durable LED Ball for nighttime playDisc-O LEDS Motion activatedAuto shut-off after 10 minutes of inactivityDurable rubber constructionWaterproof - it floats!Run time: 35 hours2 replaceable CR2032 batteries includedDiameter: 2.5" | 63mmWeight: 3.9oz | 112g