These impact-activated multi-color flashing LED balls allow for extended play after dark. The flashing LED is highly engaging and will effortlessly have your dog’s full attention. Brightly colored and multi-textured, Zeus DUO fetch ball toys are designed to provide hours of interactive fun and play for you and your dog. Zeus DUO ball toys are made using a unique duo of materials specially selected for heightened durability. The middle section of the ball is translucent nylon, capped on top and bottom with bouncy yet resilient TPR (thermoplastic rubber). The textured exterior is soft on your dog’s teeth and gums. **Lights up (LED Bulb inside the ball) when bounced.** 2-pack | Small | 2.3" 2-pack | Large | 2.8"