The eGrip is the first built-in atomizer e-cigarette from Joyetech. Not only does it feature a transparent liquid window, but also a 360-degree regulation ring to adjust output wattage up to 20 watts. In this mode, wattage output can be adjusted by rotating the regulation ring clockwise or counterclockwise. The eGrip also features adjustable airflow. To adjust your air intake, spin the adjustable screw on the side of the bottom. The looser the screw is, the more air you get. Air flow can be customized with the special tool to suit your vaping habits. The eGrip also utilizes its dedicated atomizer head, the eGrip CS head (1.5 Ω resistance) which complements its high output. To replace coil heads, unscrew the big screw at the bottom with a coin, or with the provided tool within the eGrip Kit, and the atomizer head is located on the base of it. Simply unscrew the atomizer head and replace a new one. (Please do remember to screw up the atomizer head before use). The neoteric colors are pretty eye-catching, i.e. Wood, Silver, Black, Camo. Unique appearance with smooth touch, and coupled with such vivid colors, no one can refuse to love it!