5th Gen LED Tail Light (Bright2wheels-ITU) – designed for safer rides! Brake, and it flashes six times, then stays solid red, warning nearby drivers.With high-density Led configuration ensuring optimal visibility, Stay Highly visible and enhance safety during your rides. Useful Tips in Installation: If the light doesn't illuminate, ensure secure wiring and connectors first, Reconnect them, and if issues persist, test with Test Light, or connect directly to a 12V battery using the provided wire colors.Contact us if it still doesn't work for a replacement.