UD, or the Zhuhai Youde Technology Company to give it its full name, is based in the southern Chinese city of Zhuhai on the Pearl River Delta. Founded in 2011, the company moved to its own purpose-built high tech factory in 2015. The company manufactures a comprehensive range of vaping equipment including advanced box mods, tanks with rebuildable coils and various accessories. UD invests 10% of its income in research and development and has its own research department with eight skilled engineers. Their accessories include high-grade wire and specialised jigs for DIY coil building. The company’s tank range features the Anzu RDA Tank with an adjustable dual airflow design and completely rebuildable coils. The Anzu offers excellent flavour and billowing vapour clouds. Box Mods include the Balrog 70 Watt TC, a fully featured device with ergonomic design, temperature control and variable wattage.