UWELL Whirl 22 Starter Kit and Whirl 20 Starter Kit is a couple set from UWELL. Compared with Whirl 20, Whirl 22 is powered by larger built-in 1600mAh battery, also a Safe UL certified battery in the US. It's an AIO kit that supports 25W max wattage and 3.0-3.8V voltage range. Operated through one button, the LED light indicator flashes to tell you its working conditions. The Tank has 2ml juice capacity for daily use, and the knurled top cap is more easier to screw out for e-liquid top refilling. Two 0.6ohm coils are included for you to replace, and each one supports vaping with around 8 tanks of e-liquid. For simple coil replacement, plug-pull design is adopted. In a word, Whirl 22 Kit is a great choice for amazing MTL vape and restricted DL vape. Built-in 1600mAh battery, 3.0-3.8V voltage range, 25W max output Multiple protection circuits by UWELL's independent R&D 2ml tank capacity, 0.6¡À0.1ohm resistance range Screw-to-open top refilling, plug-pull coil replacement and durable 0.6ohm coil(each supports vaping with 8 tanks of e-liquid) The pro-FOCS flavor testing technology offers amazing mouth-to-lung vape and restricted direct-to-lung vape Simple and classic appearance in multiple colors 24mm overall diameter Brand: Uwell Maximum Wattage 25W Battery Capacity 1600mAh Resistance Range 0.6¡À0.1O Capacity 2ml Material of Coils Nichrome Size 117.5 x 22.2mm