Freemax TWISTER 30W Starter Kit has a power output wattage range of 7.5W - 30W. It features a bottom wattage dial and utilizes the Freemax FM CoilTech 4.0 Coil Series. The Twister 30W starter kit has a 22mm diameter and offers coil options for both MTL or DTL vaping. It also features a 510 drip tip for each way, respectively. The wattage output can be adjusted from the bottom. Every click is 2.5W of adjustment either up or down, capping at a ceiling of 30W. The bubble glass has a large capacity of 3.5ml. It is easy and convenient to refill the TWISTER 30W. It can be refilled behind the lift and slide top fill system. It is equipped with endless types of protections and safety measures to safeguard both the user and device. The Freemax TWISTER 30W Kit proves to be a great choice for beginners.