Using a high-density bubble tube, gas evenly, and with sufficient oxygen. LED fully illuminates the air curtain, producing an impressive wall of bubbles. Can make an oxygen curtain with colored lights The bubbles are beautiful. Help increase the oxygen in the aquarium. Each unit uses a low wattage led lamps and low voltage transformer. Great night light for nocturnal viewing. Low energy consumption & Environmental friendly. Higher Luminosity and longer life. Plug & Play, easy operation. Length: 26cm Power: 1W