Lighter like "cigarette lighter" (with a resistor) handy: no more hassle to light a cigarette outdoors with wind or when there is not much gas. While it takes a little more time to light a cigarette with a flame. Is that to light cigarettes. Very good battery life. USB charging. The USB connector is retractable so discreet (no need to micro-usb usb cable like many other model) Precise diode when to recharge, when the resistance heaters (very practical) Its design is very class, metal therefore possible to engrave something on it to personalize it.