WT 1H - Supply Unit The WT 1H supply unit from Weller is a high-performance, digital single-channel supply unit with 150 W and 230 V, featuring a fast changing system and backward compatibility for soldering irons from the WSD and WD soldering stations. This smart soldering station offers high productivity and functionality. It is ESD-safe and has an anti-static plastic casing with aluminum elements. Intuitive operation is supported by a graphical LC display with backlight and a language-neutral menu. Additional features like automatic shutdown, OFF time, process window, and lock function enhance safety and efficiency.