This Kit create a unique effect of an erupting volcano. When combined, the ornament hides virtually all equipment and red colored flashing bubbles flow from the top of the ornament. The hand-painted volcano is made of resin which is safe, non-toxic, environmentally friendly and totally harmless to your fish. Volcano Size: 5.9 x 3.7 inch (D*H). Rotatable LED Spotlight, waterproof design to prevent electric leakage. Red LED spotlight shine adds a beautiful extra effect of overflowing lava. Set the Air Stone on the Volcano, fix the LED Spotlight, and put the Volcano above the Spotlight. The kit increases oxygen and creates bubbles in fish tank while attached to an air pump. (Air pump is NOT included). The kit includes a resin volcano ornament, an air stone, a power adapter and a Red LED spotlight.Comes with 12-month Free LED light Replacement Guarantee.