This device packs a huge heating chamber, dual-function mouthpiece, dual-coil system, built-in storage jar, and a whopping 1100 mAh battery in a body that is easy to carry and keep. This unit makes a flavorful and smooth experience even when you are out and about with friends. It features a bigger heating chamber, which sets it apart from the other portable-sized pens. This unique feature allows users to create fuller clouds and more distinct flavors. There is no need for you to constantly reload your device, thanks to the Evolve-D Plus’ extremely huge heating chamber.