Meet the ROCKBROS Q2 Smart Bike Tail Light—an intelligent rear light built for serious cyclists who want sharper visibility and safer rides in all weather. It signals deceleration automatically and stays reliable whether you’re commuting, training, or exploring city streets at night.

• Smart Brake Sensing: high-brightness red LED automatically intensifies when you brake, clearly signaling deceleration to drivers and riders behind you.
• Auto On/Off with Motion and Light Sensors: in modes 1 and 2, the light powers down after 30 seconds with no movement and reactivates once you’re riding again; modes 3 and 4 disable the sensor for continuous lighting.
• 4 Lighting Modes for All Conditions: adapt to day or night with Slow Flash (steady red with brake light during the day; night adds brake and auto on/off), Breathing (visible red pulse with brake in day; night adds auto on/off), Fast Flash (constant flash plus brake), and Steady On (constant light + brake).
• Bright COB LED: a high-visibility LED array ensures you stay noticeable in low-light conditions and through urban lighting challenges.
• USB-C Rechargeable, 260mAh Battery: quick ~2-hour charge provides 7–16 hours of runtime depending on mode; includes a charging indicator to show status and low power.
• IPX6 Waterproof & Lightweight: rated for heavy rain and wet roads, made from durable ABS+PC, and weighing just ~23 g for unobtrusive daily use.
• Dual Mounting Options: comes with both saddle rail and seatpost brackets for quick, tool-free installation on road, mountain, or urban bikes.

The Q2 Smart Bike Tail Light is designed to deliver real-world safety benefits. The intelligent brake signaling reduces following distance by providing a clear, immediate cue to slow down, while the auto on/off feature conserves battery during quiet commutes. Its compact form and two mounting options make it a versatile rear light that fits most bikes and rider preferences. With IPX6 protection and a lightweight build, this tail light performs reliably in rain, cold, and long training sessions, helping you ride with confidence from dawn to dusk.