a flashing light activated by movements and WITHOUT batteries… forever! The simple, practical and multi-purpose solution for all situations in the dark – on horses, dogs, riders or other sportsmen or wherever it can be attached by its clip to be seen at night. Wink’N Blink has infinite longevity and is also waterproof, weatherproof and does not need batteries that harm the environment. Its LED light consumes kinetic energy activated only by motion. Wink’N Blink pleases by its intelligent design as well as its gesture favorable to the environment.