The Modefined Sirius 200W TC Mod is constructed of durable die cast Zinc Alloy and is powered by two high amp 18650 batteries which are accessible through the bottom battery door sled. Its ergonomic chassis has anodized aluminum faceplates for a premium feel and features an easy-to-use 4 button design with an intuitive side mounted display screen. The 510 connector is secured in place by two screws and is made of solid Stainless Steel with a spring loaded Nickel plated Brass pin for accurate and optimal conductivity. Modefined combines quality, high performance and versatility making the Sirius Mod an excellent choice for any vaper.