The great thing about the SMOK Vape Pen 22 is its simplicity. It is compact, just 22mm in diameter and 110mm in height and this means it is perfect for when you are out and about. One button lets you switch the device on/off and also acts as the power button. It has a 1650mAh battery that delivers up to 4.2v of power via the direct voltage output system. The kit includes the Spiral Tank with a 0.3ohm coil that produces fantastic flavour and a top loading function for ease of use.