In this short-format review, I go over the Hidizs ST2 Pro Nebula (the 3.5mm version) after using it for about a week. It’s a $32.99 single dynamic driver IEM with a punchy, budget-friendly V-shaped tuning: boosted bass (especially mid-bass) and boosted treble, with the rest roughly following a Harman-style curve. I also quickly touch on the included accessories—flat leather pouch and three silicone tips—and honestly, the tips are pretty bad. They’re not soft, and they don’t even stay on the nozzle properly. Sound-wise, the main thing I genuinely like is the midrange and vocals. Even though they’re slightly recessed, there’s an openness and natural airiness that I don’t usually hear at this price, and I think that comes from the 8–10k boost. But the dealbreakers for me are practical and tonal: isolation is poor (it barely seals and blocks maybe 30–40% of noise), and the bass lacks authority and depth with a bit of sluggish mid-bass and sub-bass roll-off. I compare it to the Twistua D-Minor and Celest Wyvern Remaster, and for me, both have better bass depth and overall balance—so I can’t really recommend the ST2 Pro, even if plenty of people seem to like it.