Alex Duetto II by Izzo Features Let's look firstly at the features you'll find on the Alex Duetto II by Izzo. The Alex Duetto II notes the same functions found on a typical commercial espresso maker, which means it has the main espresso making function (in the center group head), a separate steam wand for steaming milk, and a separate hot water wand to dispense water for tea, etc. Where the magic really happens, however, is under the hood, where the Alex Duetto II notes a dual boiler design - a design that up until relatively recently, was only available on significantly more expensive espresso makers.