Just put this floating mist machine in the pond or fish tanks, and plugs in the usb adapter, turn on thepower. Then here comes this floating mist atmosphere.No any chemicals, heat, etc. Just enough water, then it bring you an excellent mist effect. Colorless, non- andodorless.The depth of water must be beyond8cm. Therefore, it can work effectively and properly.When is equiped with a LED powergenerator, the light shine with the out mist, adding cozyand romantics atmosphere for your fish tanks, rockery landscape, etc. (power adapter not included).Suitable for mini pool, pond, fish tanks, rockery landscape, reptiles incubator and more occasion, etc.Applicable area:less than 10 square meterWater tanks capacity:more than 10 litersNumber of fog outlets:1Noise:below 36dBRatedVoltage:220VColour:BlackMaterial:PlasticSize:Floating Rings Diameter:.10cm/3.93inchOverall Height:.13.3cm/5.23inchCombination Size:.10x10x10x13.3cm/3.93x3.93x3.93x5.23inchPackage Contents:1 * Humidifier GeneratorsOnly 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.