Convoy&reg; Portable Auto Mini Humidifier Air Purifier Freshener For Car,Cigarette Lighter Humidifier (Blue) Powered with the cigarette lighter of your car,easy to use Compact and lightweight, this personal humidifier offers portability that is perfect for using in Car Automatic water protection with a stable and reliable system that allows you to easily enjoy intelligent life Safety system: automatic shut off Water capacity: 50ml