MagicShine SeeMee 400 ANT+ Smart Tail Light
- Powerful Output: Dual high-efficiency LEDs provide up to 400 lumens, ensuring road visibility and safety.
- 360° All-round Visibility: Classic OptiTracing light technology projects a 360° halo, eliminating blind spots.
- Excellent Battery Life: Equipped with a 1600mAh large-capacity battery, providing up to 107 hours of runtime.
- Smart Control: Integrated ANT+ technology allows direct control via Garmin, Wahoo, and Hammerhead bike computers.
- Light Synchronization Technology: FTR LightSync supports remote synchronization of front and rear lights, simplifying operation.
- Brake Sensing: Smart brake sensor automatically triggers a 400-lumen strong light warning upon deceleration.
- PelotonSync Flash: PelotonSync Flash supports synchronized flashing with surrounding taillights, enhancing recognition for group rides.
All-Round Safety Protection
The SEEMEE 400 is a fully upgraded version of the SEEMEE 300: equipped with 360° OptiTracing light and a highly translucent light guide strip, providing powerful all-round warning without blind spots. It features FTR multi-light interconnection and PelotonSync Flash technology, and supports smart brake warning, vibration wake-up, and ANT+ bike computer linkage. Multiple core "black technologies" are added to make riding smarter and more convenient, doubling riding safety and efficiency.

Long-lasting Battery Life
Equipped with a 1600mAh large-capacity battery, it provides up to 400 lumens of strong light and up to 107 hours of operation time.

360° OPTITRACING Light
Projects a red halo in all directions, ensuring clear visibility from every angle and completely eliminating side blind spots.

ANT+ Bike Computer Compatibility
Supports ANT+ protocol for pairing with compatible bike computers, enabling seamless light control and linkage.

Smart Brake Sensor
Built-in dynamic sensor automatically switches to maximum brightness mode to alert following riders when braking is detected.

PelotonSync Flash
Group riding, synchronized flashing. Automatically links with surrounding taillights to enhance overall visibility and safety for the peloton.

Fearless in Harsh Weather
IPX6 waterproof performance easily handles heavy rain and splashes, accompanying you through all weather conditions.


Quick Twist-Lock
Simply turn 90 degrees for installation, securely mounting in seconds to saddle rails or seatpost.

Smart Lock Function
Transport mode prevents accidental activation in luggage, saving unnecessary power consumption.

Fast Charging and Memory
Supports USB-C 2.5-hour fast charging, features mode memory function, and clear battery indicator, always ready for action.
Lighting Modes
| Mode | Lumens (LM) | Runtime (H:M) | |
|---|---|---|---|
| Main Light | Tracing Light | Time | |
| 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 |
Product Specifications
| Max Brightness | 400 Lumens |
| Runtime | 8.5 - 107 Hours |
| Tracing Light Angle | 360° Halo |
| Waterproof Rating | IPX6 |
| Product Warranty | 2 Years |
| Battery Capacity | 3.7V, 1600mAh |
| Charging Time | 2 - 2.5 Hours (5V, 2A) |
| Body Material | Aluminum Alloy |
Package Contents
User Manual (Click here to download)
- Powerful Output: Dual high-efficiency LEDs provide up to 400 lumens, ensuring road visibility and safety.
- 360° All-round Visibility: Classic OptiTracing light technology projects a 360° halo, eliminating blind spots.
- Excellent Battery Life: Equipped with a 1600mAh large-capacity battery, providing up to 107 hours of runtime.
- Smart Control: Integrated ANT+ technology allows direct control via Garmin, Wahoo, and Hammerhead bike computers.
- Light Synchronization Technology: FTR LightSync supports remote synchronization of front and rear lights, simplifying operation.
- Brake Sensing: Smart brake sensor automatically triggers a 400-lumen strong light warning upon deceleration.
- PelotonSync Flash: PelotonSync Flash supports synchronized flashing with surrounding taillights, enhancing recognition for group rides.
All-Round Safety Protection
The SEEMEE 400 is a fully upgraded version of the SEEMEE 300: equipped with 360° OptiTracing light and a highly translucent light guide strip, providing powerful all-round warning without blind spots. It features FTR multi-light interconnection and PelotonSync Flash technology, and supports smart brake warning, vibration wake-up, and ANT+ bike computer linkage. Multiple core "black technologies" are added to make riding smarter and more convenient, doubling riding safety and efficiency.

Long-lasting Battery Life
Equipped with a 1600mAh large-capacity battery, it provides up to 400 lumens of strong light and up to 107 hours of operation time.

360° OPTITRACING Light
Projects a red halo in all directions, ensuring clear visibility from every angle and completely eliminating side blind spots.

ANT+ Bike Computer Compatibility
Supports ANT+ protocol for pairing with compatible bike computers, enabling seamless light control and linkage.

Smart Brake Sensor
Built-in dynamic sensor automatically switches to maximum brightness mode to alert following riders when braking is detected.

PelotonSync Flash
Group riding, synchronized flashing. Automatically links with surrounding taillights to enhance overall visibility and safety for the peloton.

Fearless in Harsh Weather
IPX6 waterproof performance easily handles heavy rain and splashes, accompanying you through all weather conditions.


Quick Twist-Lock
Simply turn 90 degrees for installation, securely mounting in seconds to saddle rails or seatpost.

Smart Lock Function
Transport mode prevents accidental activation in luggage, saving unnecessary power consumption.

Fast Charging and Memory
Supports USB-C 2.5-hour fast charging, features mode memory function, and clear battery indicator, always ready for action.
Lighting Modes
| Mode | Lumens (LM) | Runtime (H:M) | |
|---|---|---|---|
| Main Light | Tracing Light | Time | |
| 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 |
Product Specifications
| Max Brightness | 400 Lumens |
| Runtime | 8.5 - 107 Hours |
| Tracing Light Angle | 360° Halo |
| Waterproof Rating | IPX6 |
| Product Warranty | 2 Years |
| Battery Capacity | 3.7V, 1600mAh |
| Charging Time | 2 - 2.5 Hours (5V, 2A) |
| Body Material | Aluminum Alloy |
Package Contents
User Manual (Click here to download)