Swallowtail is a box MOD offered by Sigelei you didn't know you need. It has a maximum voltage of 75 Watts. It is powered by a single 18650 battery. This isn't all of it. Instead, you also get an aluminum alloy exterior with a splash paint design. This gives the MOD a funky a vibrant look. There are different levels of power mode offered by the MOD which gives you autonomy you need to enjoy the experience to the fullest.