Each kit comes with single bubble sticks, optional for pair or sound control module. Once you connect with sound control module it'll run up to two set(4 bubble sticks).Each bubble kit includes 8 different changes by 3 LED.
8 speed settings, from slow to fast
Sound module (optional) off/on/sound
Control / Flash
Super bubble effect
Easy to install plug and play
Dual 6.6″ Acrylic stick