The New 2020 Edition Evolve D is a compact dry herb combustion vaporizer.  There is a dry herb chamber in the atomizer tube and the innovative mouthpiece is spring loaded to ensure that the material contacts the coil as you use it.  Th Pancake Dual Coil allows more heat for better results. The 650mAh battery has a convenient 5 clicks within 2 seconds lock feature so you can put it in a pocket or bag without worries.  The battery allows 10 seconds of continuous heat before the safety shutoff kicks in.