The improved lil SOLID 3.0 model lil SOLID 3.0 is everything you love about lil SOLID devices, plus three more steps: 1) 2 operating modes: now you can control the intensity of the flavor 2) Easy cleaning thanks to the removable heating module 3) Autostart: the device turns on automatically when the stick is inserted And also an updated design in four stylish colors with a metallic sheen.