Rayo Smart Bicycle Tail Light w/ brake light, theft alert, group sync, and custom patterns


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  • Regular price $69.99
  • Will be in stock after
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Rayo is a bicycle tail-light designed for the modern cyclist. Equipped with ultra-bright LEDs, engineered optics, motion detection, and bluetooth connectivity features, Rayo’s functionalities not only boost your riding safety, but also make your riding experience more convenient, entertaining, and seamless.

Note: The default strap included in the package is suited for standard (round) seatposts of 27-32 mm in diameter. For aero-type seatposts of 130-160mm in circumference, you can get the Aero Seatpost Adaptor Kit here!



SMART AS HECK: Boost your riding safety with this ultimate smart bicycle rear light

WATER-RESISTANT AND RECHARGEABLE VIA USB: All of Rayo’s features come sealed within an IPX4 waterproof body. A built-in USB port makes Rayo rechargeable at home, in the office, and from external power banks.

ULTRA BRIGHT: Rayo offers innovative ultra bright LED lights

BRAKE LIGHT: Upon braking, Rayo will detect that you are slowing down and will automatically trigger a brake light, warning traffic behind you. At the core of this feature is an algorithm that accurately tracks the movement of the bike, similar to what is integrated into modern drones.

THEFT ALERT: Rayo sends your phone a theft alert via its mobile app when unfamiliar movement is detected on your bike via Bluetooth in short distances

ENGINEERED OPTICS: Rayo uses specifically designed total internal reflection (TIR) lenses to direct and focus light emitted by LEDs. The combination of three LEDs and two TIR lenses with different specifications enhances visibility from both the rear and the sides.

CUSTOM PATTERNS: The blinking patterns of each LED light in Rayo are user-configurable, allowing you to create the best signaling options depending on your riding style, traffic, and weather conditions. Future updates will include additional flashing patterns.

GROUP SYNCHRONIZATION: Rayo’s one-of-a-kind feature is group LED synchronization. Rayo can synchronize flashing patterns with nearby Rayo lights, making you and fellow riders stand out as a group. Synchronization takes effect without the hassle of manually pairing devices.



  • L72 X W35 X D40 mm


  • 3 X Ultra-bright LEDs
  • 6-axis motion sensor

Compatibility: Seatposts up to 32 mm in diameter

Output: Maximum 90 lumens

Runtime: Up to 20 hours (in low-power mode)

Connectivity: Bluetooth Low Energy


  • Lithium-polymer 1000 mAh
  • USB Rechargeble
  • 3 hours charge time

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