[Super Dense Mist]: the mist can cover an area about 3.28 square feet, it can fully solve your needs, Giving you a more powerful and stable mist effect. [Automatic Power-off]: There's a water level sensor on our mist maker, it can stop the mist maker when the water level is too low. [Electrocution- Coating]: It has an internal insulation coating, It the safety of people and pets. [More Convenient USB Component]: There's a USB interface, it be more convenience to use, but it don't come with power plug. [Widely Use]: It can add great amount of mist, You can put it in your pond, rockery, fish tank, vase, tank. Colour: Black Material: plastic Package Contents: 2 x Mist Maker 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.