The Rockbros Q5 Black rear bicycle light is a cutting-edge tail light designed with an intelligent STOP system that significantly enhances rider safety. This innovative feature automatically increases brightness when braking, making it a crucial accessory for all cyclists.

With a remarkable output of 60 lumens, the light ensures excellent visibility during low-light conditions. Constructed from durable CNC aluminum alloy, it boasts a sleek black finish and compact dimensions of approximately 40 x 34 x 34 mm. Weighing only 55 grams, including the mounting hardware, it provides easy installation on both saddle and seat posts.

Key technical features include:

• Smart Brake Technology: Incorporates a built-in accelerometer and smart sensing chip that detects braking through vibration and kinetic movement, automatically increasing light intensity to alert other road users.
• Lighting Modes: Offers 4 distinguishable modes — constant light, breathing, SOS, and flashing — adaptable to various riding conditions.
• Battery: Powered by a 3.7V/400mAh rechargeable Li-ion battery, providing a runtime extending beyond 20 hours and conveniently charged via USB-C.
• Water Resistance: With an IPX6 waterproof rating, this light is suitable for use in all weather conditions.
• Power Saving: Automatically turns off after 30 seconds of inactivity (except in constant light mode), and features an intelligent light sensor for seamless operation.
• Mounting Options: Comes with two mounting solutions—one for the seatpost and another for the saddle—to accommodate user preferences.
• Additional Features: Shows battery level through periodic flashes, includes a parking mode for easy transition, and adheres to IP65 dustproof standards.

In summary, the Rockbros Q5 light combines high-quality materials and sophisticated sensor technology, designed specifically to enhance visibility and safety for cyclists during night rides or emergency braking situations.