The Cool Fire IV features a greater range of Variable Voltage, Variable Wattage, advanced safety features, portable electronics charging capacity and also 'Vape while charging' Technology. The Cool Fire IV has a flush 510 connection with a spring loaded positive pin, durable stainless steel threading, an included ego adaptor. The Cool Fire IV has a variable voltage range of 3.0 - 7.5 volts adjustable in .1 volt increments and a variable wattage range of 6.0 - 40.0 Watts, adjustable in .5 watts increments. The Cool Fire IV uses Vrms DC current and is very accurate with a power deviation of 0.1Watt. The full 40 Watts is precisely maintained between resistances of 0.3 to 2.5 Ohms. There is no wasted power and exact accuracy means you are always vaping the power level that you choose. Vrms provides superior precision in delivering the exact wattage Ohm's Law requires and stable power means better vapor. The high quality OLED screen looks great and clearly displays the resistance of the attached tank & coil, voltage, wattage and also accurately shows the remaining battery charge.
- Long battery life so less time charging
- 40W of power enough for even the heavest smoker
- Led Screen for power information and battery indicator
- Zero nicotine product