Kevenz Multi-color Goose Feather Badminton Shuttlecocks with Great Stability and Durability， High Speed Badminton Birdies. LED lights installed in the cork's back， with on/off push button. The lights are activated by an inside switch， so you can't accidentally turn them off. These light-up birdies are bright and durable， change colors， and have a battery life of 20 hours. The cork ball head and each shuttlecock weigh approximately 6.7g/0.24oz. 4 x LED Feather Shuttlecock

Kevenz 6 Pieces LED Shuttlecock Badminton Set Dark Night Glow Birdies Lighting:

• This badminton birdie is equipped with LED lights， turns red， green， blue and one alternates between all four colors
• Material: Advanced Goose Feather， High quality LED lights
• The LED lights can be switched on and off easily
• Available to play in the dark or bright environment Pack of 6， with great stability and durability"