Can play in OUT-SIDE with WINDYand usable at-Night time.A shuttlecock is small and lightweight, so it can hardly be recognized at night while playing badminton.Li-Tech developed an innovative shuttlecock(Made in Korea) used at night as well as in the daytime by a simple operation of a switch, a first in the world. Users can play badminton even within a jet-black night by turning on the switch inside the shuttlecock .And, the product employs an LED of high brightness, and a highly efficient lithium ion battery which provides a long lifespan for the shuttlecock.In addition, through employing highly-elastic silicon, the newly-developed shuttlecock has a higher elasticity and flies 2-3meters further than the other existing shuttlecock. Plus, the new item is less affected by the wind, so users can play badminton with it in outdoor place.Our company has a patent pending for the LED protection technology and device which mitigates the impact on the LED by the strong racketing. Thanks.