Bringsine LED Badminton Shuttlecock Dark Night Glow Birdies Lighting for Indoor Sports Activities Package includes: 4 Pcs of Green Led Badminton. Fun to play at night.Good durability and excellent performance. LED lights installed in the back of the cork, with On/Off push button. Material: goose feather, feather, SMD lamps, Electronic products. Economical shuttlecocks for beginners and amateurs. Goose feather.WithOne-button Activation. The LED lights can be switched on and off easily with the press of a button placed in the back of the cork. Enjoy playing badminton at night with your friends or family. 4 LED badmintons in one pack box,enough for paying. Professoral design Each shuttlecock weighs only 6.7g/0.24oz for great bounce and ease of handling.