The Innokin Kroma Kit is easy to use and control. The Fire and Adjustment buttons are conveniently located for quick access. Variable Wattage (VW) and Temperature Control (TC) settings for Stainless Steel, Nickel, and Titanium coils may be quickly adjusted using a traditional OLED display panel (not supplied). If you have a proper TC atomizer, the Kroma mod allows you to alter the TC wattage. In addition to configuration changes, the OLED panel shows your firing voltage and a vape timer.