Taking the Magene L508 smart radar taillight onto real roads for a stress test under actual conditions, paired with the budget-friendly Magene C406 Pro bike computer for connectivity verification. The footage starts with exterior installation and light mode switching, then cuts to real road riding scenes, directly testing the radar's detection distance and warning response when high-speed vehicles approach from behind. The screen fully shows the visual alerts, sounds, and distance icons on the bike computer after receiving radar signals, and further challenges the setup under harsh conditions such as consecutive multi-vehicle overtakes, curves, and complex traffic. Can this budget radar combo truly become a reliable safeguard for cyclists on open roads?