Dog Frisbee with Light by Nite Ize. A flying disc for playing at night or in low light. Features a bright LED light that changes colour, ideal for games of fetch in low visibility conditions. 

Features: 

Made from durable, soft-touch plastic.
Designed for optimal flight and will withstand daily use
Colour-changing LED light: The LED light illuminates the entire disc, running the colour spectrum as you play with your dog.
Bite-resistant cover protects the replaceable batteries (included)
Waterproof and floatable