Can connect to air pump for air bubble billow effect (Air pump not included)IP68 waterproof rate, excellent sealed design, can be fully submerged in water6 colour changing LEDs and an air stone combined in a single decor piece (2 inches diameter)Built-in air stones create air bubbles for improved oxygenation and gas exchangeCreates a decorative array of bubbles and colorful column of air in your aquariumfish tank bubble maker fill with stone, can sit at the bottom of tank steady with 3 mini suction cup. The color-changing Led bubble light come with 5.58 ft long power cable, can be submersed into water, widely use for aquariums, fish tanks, pools and so on. It create a colorful column of bubbles in your aquarium with endless color combinations thanks to 6 color changing RGB leds.Directions for Use:Attach airline tubing (sold separately) to Air Inlet on the LED Bubble Ring.Make sure Airstone is securely in place.Connect Airline Tubing to an Air Pump (Air pump is not included).Connect Power Cord to Transformer.Position and anchor LED Bubble Ring by covering Flaps with gravel.Plug Transformer and Air Pump into electrical outlet.Note:Please put the air stone into water to soak for 15-20 minutes before you connected it to the air pump, so that bubbles can emit all around. If the bubbles did not come out of whole circle and only coming out one side of the disk, your should sure the pump you use has enough power to work it.Plug Type: EU Plug, it applies to Indonesia, Germany, France, Spain, Italy and so on.colour:blackMaterial:ABSPackage Contents:1 * Air Bubble Light1 * 3/16 Inch Air Tube1 * User Manual1 * Power Cable1 * 12V DC AdapterOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.