With max 400 LED lumens and an improved eye-catching warning flashing mode, the TR400 delivers outstanding daytime visibility and can be seen from up to 2.6 km away. The rear light features a smart light-sensing mode that automatically switches between Daytime Flash and Breathing Mode according to ambient light conditions. It also comes with an intelligent brake sensor for enhanced safety and an auto on-off function for convenient operation. With up to 350 hours of runtime, IPX6 waterproof protection, dual mounting options for seatposts and saddle rails, a hidden USB-C charging port, and a built-in battery level indicator, the TR400 is ready for reliable riding in all conditions.
High Visibility for Maximum Safety
Ultra-bright 400-lumen output delivers exceptional rear visibility, reaching up to 2.6 km, so you can be seen clearly even from a distance. Combined with a 270° wide viewing angle, it ensures all-around visibility for enhanced safety, day or night.
350h Battery Life
Delivers up to 350 hours of runtime, ensuring long-lasting performance and fewer recharges for worry-free everyday riding.
Smart Light-Sensing Mode
Automatically adapts to ambient light conditions—switching to Daytime Flash in daylight and Breathing Mode at night—for optimal visibility without manual adjustment.
Brake Detection
Automatically highlights the rear light for 3 seconds when braking to alert drivers behind you, increasing visibility and safety.
Automatic Power On/Off
Features an auto-start/stop function: when stationary, it turns off after 2 minutes; when movement is detected, it powers on automatically.
Built Tough for All Weather
No need to fear rain or splashes. With an IPX6 waterproof rating, the TR400 is designed to withstand tough weather conditions.
Battery Indicator
With a simple click, you can check the battery level through the displayed light pattern.
Flexible Mounting Options
Supports both seat rail and seat post mounting.
USB-C charge port
The hidden USB-C connector makes charging safe and convenient.
LED: High-efficency red LEDs
Battery: 2000mAh/3.7V rechargeable Li-polymer battery
Dimensions (Tail light):43mm (L)26mm (W)66mm (H)
Weight (Tail light): 86.5g
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