The new Uwell Whirl 20 & Uwell Whirl 22 Starter Kit is powered by a direct output voltage system in which power levels depends on the state of the battery capacity with a maximum output of 25W. The Uwell Whirl 20 Kit features a built in 700mAh Internal Battery and has a more slender 20.2mm Diameter chassis. The Uwell Whirl 22 Kit features a 1600mAh Internal Battery and a slightly wider 22.2mm Diameter chassis. Both are operated by a single firing button and equipped with LED battery light indicator backed by Uwll's independent R&D. The integrated tank is beautifully crafted with a grooved bottom and top base and a maximum eJuice capacity of 2mL, accessed via threaded top-fill method. Built for both restricted direct to lung and mouth-to-lung users, the WHIRL Tank utilizes the new pro-FOCS (Professional Flavor Optimization Core System) flavor technology with a set of 0.6ohm Whirl Coils.