Based on this product's specifications, here are some alternatives and similar models
Curved Manual Treadmill No name ZROT4 — non-motorized curved running deck, compact design
Summary description:
Curved manual treadmill No name ZROT4 is a non-motorized fitness machine featuring a curved running deck that leverages user stride to generate motion. Designed for high-intensity interval training, sprinting and endurance workouts, it offers a compact footprint and straightforward mechanical resistance. Suitable for home gyms and commercial studios seeking a low-maintenance, self-powered running solution.