Mig Vapor presents the Sub 40 Vaporizer, a variable voltage and wattage, 510 thread compatible, 2200mAh built in battery device. The Sub 40 has a maximum wattage output of 40W and a maximum voltage output of 4.2V. The 510 threading on the Sub 40 makes it compatible with many herbal concentrate cartridges and atomizers. This device features an over sized firing button and two smaller buttons below the screen to adjust power output. The built in battery can be recharged through micro USB port below the button interface. The screen displays the current battery life, voltage, wattage, resistance settings, as well as a low wattage warning. The Mig Vapor Sub 40 vaporizer is an excellent device that is for users looking for convenience and discretion.