Curve mode is a way of regulating the electrical current sent to the clearomizer or atomizer, which involves setting a curve for the power delivered. Curve mode allows you to adjust the power throughout the vape on an electronic box: for example, for the first 3 seconds, you could choose a power of 50 W to get the coil heating up properly, then 30 W afterwards. You can adjust the wattage (Customized Curve Watt = CCW), the volts (Customized Curve Volt = CCV) or the temperature (Customized Curve Temperature = CCT) when you use the temperature control.