I only see power requirements (1300 W) but no mention of voltage or frequency requirements---not even in the user guide. The pricing in € hints that the creators are in 240/1/50-land, and that I'm out-of-luck in the 120/1/60 wastes of North America. It's a shame, because I'm very much the target demographic for a kit like this. One could transform it from 120 V or run it on our 240 V split-phase with an isolation transformer of course, but running the A/C pump 20% faster might be dubious.
As an aside, I'm frustrated for the same reason regarding induction cooktops. European units are a fraction of the cost of their American equivalents.
You're probably not out-of-luck. Just buy a heat element designed for your grid's voltage. The electronics' internal PSU might already be capable having a wide range input.
Besides that, I would absolutely not recommend you buy this.
Reason: the parent commenter already hinted in the right direction. The E61 brew group is ancient (invented in 1961 by Faema in Italy, hence the name), it sports 4kg of brass and many moving parts (3 valves, camshaft + lever) and features an analog pre brew chamber.
I do restore italian espresso machines for a hobby and have come to the same conclusion as the parent. Even if they're not maintained properly those things are meant to last and can in most cases be resurrected. Most spare parts are readily available and defacto industry standard (eg. The Brasilia ring brew head) and you can retrofit nice electronics easily (eg. clever coffee or the gaggiuino foss controller project featuring pressure transducers, pid controller(s) and a controllable Flow/Pressure rate, profiles, apps and so on).
This diy project is imho bland and uses the most ancient brew head available, with unnecessary heat dissipation, long warmup times and probably leaded brass...
As an aside, I'm frustrated for the same reason regarding induction cooktops. European units are a fraction of the cost of their American equivalents.