The Cuboid uses a variable temperature control (VTC) system with firmware V3.0 and up to 150W output. Programmed for titanium, nickel, and 316 stainless steel coils. Cuboid also enables you to customize and save 3 TCR (temperature coefficient of resistance) values for different coil materials, thus further improving the accuracy of temperature control. Stainless steel 510 threads and a wide border match well with larger sized tanks. Powered by two replaceable 18650 cells. Multi-colour 0.96-inch OLED screen and the new dual-battery bar display make it practical and attractive. Upgradeable firmware ensures that your device is always up to date. Firmware 3.10 now available which allows you to upgrade to 200W. Available in 3 colours: Black, Brushed Stainless Steel and Metallic Silver-Grey. Battery case only. Tank, charger and lithium-ion batteries available separately. Requires 2 lithium ion batteries.