The SMOK D-Barrel features a unique double barrel design. The D-Barrel is a dual 18650 mod that can fire up to 225 watts and supports multiple temperature control modes. The D-Barrel features multiple preheat modes and a convenient stealth mode as well. The D-Barrel's trigger fire button is designed to be ergonomic and comfortable. The D-Barrel features a OLED display screen that is conveniently located on the top of the device.