The Eleaf iWu is portable and compact all-in-one pod system designed for all kinds of users. The Eleaf iWu features a protective hollow out cover design that may be retracted. The iWu features a leak resistant side fill design that helps minimize messes. The iWu features the classic automatic style with no buttons required. The iWu is automatically activated when you inhale. The iWu features a built-in 700mAh battery in a lightweight and compact design with a max wattage of 15 watts. The iWu includes (2) refillable empty 2.0ml cartridge which may be filled with your favorite e-Liquid of your own choosing. The iWu may be charged via the micro USB charging port.