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 synchronised 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.

Features

• Dual high-power LEDs output up to 400 lumens for strong road presence and added safety.
• Signature OptiTracing light projects a 360° glowing halo for all-around safety.
• Powered by a 1600mAh battery, delivering up to 107 hours of runtime.
• ANT+ integration enables direct control via Garmin, Wahoo, and Hammerhead computers.
• FTR LightSync enables remote sync between front and tail lights for streamlined use.
• Smart brake sensor triggers a full 400-lumen alert for added stopping safety.
• PelotonSync Flash syncs with nearby taillights for coordinated group visibility.

Light modes

Mode	Lumens	Main light	OptiTracing light	Runtime (h:min)
Low	15LM	15-0LM		19:00
High	90LM	90-0LM		08:30
Night flash	45-75LM		60LM	08:30
Day flash	400-0LM		/	18:00
Eco flash	30/0LM		/	107:00

In the box

• SEEMEE 400 x1
• Seat post mount x1
• Saddle mount x1
• Mounting strap x2
• Type-C charging cable x1
• User manual x1