Cascade presents the LED Air Stone by Penn-Plax. This brightly vivid bubbler features 12 LED Lights that create a colorful ring of bubbles with constant ever-changing light effects, providing your tank with additional color and action, for you, as well as your fish! Great for Fresh and Marine tanks. It connects to an air pump and a check valve via line tubing. The LED Lights are powered separately from the air supply, and use a USB power cord (power supply block not included). Please Note: Air Pump, Line Tubing, and Check Valve not included.