American DJ's Rotoballs Tri LED has two rotating balls produce 60 sound-activated beams that change color and strobe to the sound of the music. It uses 4 x 3W 3-in-1 RGB "TRI Color" LEDs to create a variety of colors (Red, Green, Blue, Purple, Yellow, Cyan & White). This simple, yet fun light effect has a knob to adjust the speed of the rotation up to 35RPM, and can run all night with no duty cycle.