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 water 6 colour changing and an air stone combined in a single decor piece (2 inches diameter) Built-in air stones create air for improved oxygenation and gas exchange Creates a decorative array of and colorful column of air in your aquarium fish 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 in your aquarium with endless color combinations thanks to 6 color changing RGB . 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 can emit all around. If the not come out of whole circle and only 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, , Italy and so on. colour:black Material:ABS Package Contents: 1 * Air Bubble Light 1 * 3/16 Inch Air Tube 1 * User Manual 1 * Power Cable 1 * 12V DC Adapter Only the above package content, other products are not included. Note: Light reflection 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.