It features passthrough charging as well as an adjustable 510 pin. Five clicks of the power button turns it on. It has four, blue indicator lights on the side to monitor battery life.
The Lite 40 Tank is an adjustable airflow, 510 threaded, pyrex glass tank with a 3ml e-liquid capacity. To fill with e-liquid, unscew the base and fill, avoiding passing the center post. Re-attach the base. Attach to the Lite 40 and you're ready to vape.