
Bicycle Rear Light | Automatic Brake Light & Ambient Light Sensor | USB Rechargeable | Waterproof
Bicycle Rear Light | Automatic Brake Light & Ambient Light Sensor | USB Rechargeable | Waterproof
Safe cycling visibility instantly adjusted to conditions
Maximized rear visibility in all light conditions — automatic brightness adjustment without manual controls or battery replacements.

Why is this bicycle rear light perfect for you?
âś” Automatic brake light for immediate stop detection.: The rear light instantly brightens upon sudden stops, providing clear signaling to following vehicles and enhancing safety without requiring manual activation.
âś” Smart ambient light sensor for dynamic brightness.: Brightness is automatically adjusted according to surrounding light levels, ensuring optimal visibility both day and night without user intervention.
âś” USB rechargeable and waterproof design.: Integrated USB charging eliminates battery replacements, and the IPX4 waterproof rating makes the light durable and reliable in rain and snow conditions.
âś” Automatically detects braking and ambient light to enhance visibility and safety.: The intelligent bicycle rear light features automatic detection of braking and ambient light conditions, maximizing your visibility on the road at all times. When a sudden stop is detected, the brake light immediately brightens to alert following drivers, allowing them to react in time and reducing the risk of collisions. Additionally, the integrated light sensor dynamically adjusts the brightness based on day or night conditions, ensuring optimal illumination without manual adjustments. This smart functionality enhances rider safety significantly, making it a reliable choice for any cyclist.
Specifications
Material: ABS plastic, aluminum
Luminous intensity: Up to 50 lumens
Sensors: Brake and light sensor automatic
Light modes: IPX4 waterproof rating, suitable for use in rain and snow conditions.
Mounting: Tool-free installation, mounts under the saddle or on the seat post.
Original: $34.95
-70%$34.95
$10.49More Images







Bicycle Rear Light | Automatic Brake Light & Ambient Light Sensor | USB Rechargeable | Waterproof
Safe cycling visibility instantly adjusted to conditions
Maximized rear visibility in all light conditions — automatic brightness adjustment without manual controls or battery replacements.

Why is this bicycle rear light perfect for you?
âś” Automatic brake light for immediate stop detection.: The rear light instantly brightens upon sudden stops, providing clear signaling to following vehicles and enhancing safety without requiring manual activation.
âś” Smart ambient light sensor for dynamic brightness.: Brightness is automatically adjusted according to surrounding light levels, ensuring optimal visibility both day and night without user intervention.
âś” USB rechargeable and waterproof design.: Integrated USB charging eliminates battery replacements, and the IPX4 waterproof rating makes the light durable and reliable in rain and snow conditions.
âś” Automatically detects braking and ambient light to enhance visibility and safety.: The intelligent bicycle rear light features automatic detection of braking and ambient light conditions, maximizing your visibility on the road at all times. When a sudden stop is detected, the brake light immediately brightens to alert following drivers, allowing them to react in time and reducing the risk of collisions. Additionally, the integrated light sensor dynamically adjusts the brightness based on day or night conditions, ensuring optimal illumination without manual adjustments. This smart functionality enhances rider safety significantly, making it a reliable choice for any cyclist.
Specifications
Material: ABS plastic, aluminum
Luminous intensity: Up to 50 lumens
Sensors: Brake and light sensor automatic
Light modes: IPX4 waterproof rating, suitable for use in rain and snow conditions.
Mounting: Tool-free installation, mounts under the saddle or on the seat post.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
Safe cycling visibility instantly adjusted to conditions
Maximized rear visibility in all light conditions — automatic brightness adjustment without manual controls or battery replacements.

Why is this bicycle rear light perfect for you?
âś” Automatic brake light for immediate stop detection.: The rear light instantly brightens upon sudden stops, providing clear signaling to following vehicles and enhancing safety without requiring manual activation.
âś” Smart ambient light sensor for dynamic brightness.: Brightness is automatically adjusted according to surrounding light levels, ensuring optimal visibility both day and night without user intervention.
âś” USB rechargeable and waterproof design.: Integrated USB charging eliminates battery replacements, and the IPX4 waterproof rating makes the light durable and reliable in rain and snow conditions.
âś” Automatically detects braking and ambient light to enhance visibility and safety.: The intelligent bicycle rear light features automatic detection of braking and ambient light conditions, maximizing your visibility on the road at all times. When a sudden stop is detected, the brake light immediately brightens to alert following drivers, allowing them to react in time and reducing the risk of collisions. Additionally, the integrated light sensor dynamically adjusts the brightness based on day or night conditions, ensuring optimal illumination without manual adjustments. This smart functionality enhances rider safety significantly, making it a reliable choice for any cyclist.
Specifications
Material: ABS plastic, aluminum
Luminous intensity: Up to 50 lumens
Sensors: Brake and light sensor automatic
Light modes: IPX4 waterproof rating, suitable for use in rain and snow conditions.
Mounting: Tool-free installation, mounts under the saddle or on the seat post.
























