The Rhotron fits all 510-threaded cartridges, both small and wide, while still being reasonably priced, the Rhotron is a great choice. It has useful features and a small design, so it's easy to carry around. One advantage is its fast USB-C charger, which can quickly charge the 400 mAh battery. Plus, it's not only convenient but also comes in different patterns to match your personal style. Whether you're an experienced vaper or new to it, the Tronian Rhotron is a fantastic option for vaping on the go without spending too much.