Asmodus Minikin V1.5 Boost brings significant upgrades to the popular original body style with increased power (155W), a secure magnetic sliding battery door, and new firing modes: Power, Temp Ni200, Temp SS316, Temp SS317, Temp SS304, Temp Ti, TCR, TFR, and Curve. Temperature Factors of Resistance (TFR) can offer greater accuracy than using a Temperature Coefficient of Resistance (TCR) through the use of a curve. Curve mode applies ramping with a power curve which can be manually adjusted with up to 5 different wattages up to 10 seconds. The Minikin V1.5 supports an atomizer resistance range of 0.1 - 2.5 ohm, and fits atomizers up to 25mm with no overhang. The micro USB port supports charging and software updates.