The Lezyne Strip Pro AI Alert 400+ Rear Light represents the future of cycling safety technology. Featuring Lezyne’s groundbreaking AI Alert system, it combines artificial intelligence with Lezyne’s proven ALERT taillight platform to deliver the most accurate and responsive cycling brake light available.

The light automatically detects braking events and instantly shifts into Active Alert Mode, emitting a powerful 150-lumen rapid flash to clearly signal deceleration. This intelligent reaction effectively communicates your movements to both motorists and fellow cyclists, dramatically improving awareness, visibility, and safety in all riding conditions.

Engineered for performance and reliability, the Strip Pro AI Alert 400+ pairs advanced safety innovation with the high-output illumination riders expect from Lezyne—making it an essential choice for those who demand both cutting-edge technology and uncompromising visibility.

*Ai Alert lights come pre-programmed and do not collect rider data.

The Strip Pro AI Alert 400+ Rear is a premium taillight that combines class-leading visibility with next-generation AI Alert technology for unmatched cycling safety. Engineered with 10 ultra-bright LEDs, it delivers a powerful beam pattern optimized for wide, even light dispersion—even in the most challenging riding conditions.

Its lightweight, co-moulded construction is built to last and paired with Wide Angle Optics, providing up to 270° of visibility for maximum safety on the road. Riders can choose from seven versatile output modes, including the attention-grabbing 400-lumen Day Flash mode and the long-lasting FEMTO mode, which offers up to 80 hours of runtime.

Mounting is simple and secure with the versatile silicone strap, designed to fit both aero and round seatposts. The light is IPX7 waterproof rated, ensuring reliable performance through rain, grit, and the harshest conditions. A high-capacity 1900 mAh battery powers the system, with convenient USB-C waterproof charging (cable not included) for modern ease of use.

Features:

• New: Advanced rear light with 'Ai Alert' brake sensing technology
• New: Detects deceleration and changes output mode accordingly
• Max Lumens: Max 400 lumens/80 hour runtime in Femto mode
• Outputs: 7 combined solid and flash output modes including a highly disruptive Daytime Flash mode
• Battery Capacity (mAh): 1900
• Recharge Type: USB-C rechargeable (cable not supplied)
• Weight: 71g
• Features: IPX7 waterproof standard, Wide Angle Optics 270deg of visibility, Aero and round seatpost compatible