The SEEMEE 400 is a completely upgraded version of the SEEMEE 300: 360° follow light + high-transparency optical light guide strip to achieve no blind spots and strong warning; upgraded with FTR multi-light interconnection and team synchronized flashing technology, and also supports intelligent brake warning/vibration wake-up, ANT + bike computer pairing and light control, empowered by multiple core black technologies, making it smart and convenient, and doubling the riding safety efficiency.