Magicshine SEEMEE 400 ANT+ Smart Taillight

The Magicshine SEEMEE 400 ANT+ Smart Taillight is a high-performance rear bicycle light designed to keep you highly visible in traffic, during night rides and in low-light conditions. With a powerful 400-lumen output, 360° OptiTracing visibility and multiple smart features, it combines strong illumination with advanced cycling connectivity. Its ANT+ connectivity allows the SEEMEE 400 to pair with compatible cycling computers from brands such as Garmin, Wahoo and Hammerhead, giving riders convenient control and access to light information from their bike computer. The light also supports FTR LightSync, allowing compatible Magicshine front and rear lights to work together. The built-in smart brake sensor automatically increases the light output when deceleration is detected, providing a stronger warning to riders and motorists behind you. The OptiTracing 360° light adds visibility around the rear of the bike, while PelotonSync Flash enables synchronized flashing with compatible nearby lights for group riding. Powered by a 1600mAh battery, the SEEMEE 400 offers up to 107 hours of runtime, depending on the selected mode. Its aluminum-alloy body, USB-C charging and IPX6 waterproof rating make it suitable for demanding everyday cycling and changing weather conditions. Key Features 400-Lumen Maximum Output – Powerful rear illumination for enhanced visibility. 360° OptiTracing Light – Creates an illuminated halo for improved all-around visibility. ANT+ Connectivity – Pair with compatible Garmin, Wahoo and Hammerhead cycling computers. Smart Brake Sensor – Automatically triggers a high-output brake warning when deceleration is detected. FTR LightSync – Enables synchronization with compatible Magicshine front lights and remotes. PelotonSync Flash – Synchronizes flashing with compatible nearby taillights for group riding. 1600mAh Battery – Provides up to 107 hours of runtime depending on the mode. IPX6 Waterproofing – Designed to withstand rain and water spray. USB-C Charging – Convenient rechargeable design with approximately 2–2.5 hours charging time. Quarter-Turn Mount – Quick mounting system for seatpost or saddle applications. Lockout Function – Helps prevent accidental activation during transport. Mode Memory – Remembers the selected lighting mode. Light Modes Mode Main Light OptiTracing Light Runtime Low 15 LM 15–0 LM 19 hours High 90 LM 90–0 LM 8.5 hours Night Flash 45–75 LM 60 LM 8.5 hours Day Flash 400–0 LM — 18 hours Eco Flash 30/0 LM — 107 hours Brand Magicshine Model SEEMEE 400 ANT+ Product Type Smart Rear / Taillight Maximum Output 400 Lumens Runtime 8.5–107 Hours Battery 3.7V 1600mAh Charging USB-C Charging Time 2–2.5 Hours Connectivity ANT+ LightSync FTR LightSync Visibility 260° + 360° OptiTracing Light Brake Sensor Yes PelotonSync Yes Waterproof Rating IPX6 Body Material Aluminum Alloy Mounting Quarter-Turn Mount Weight 80g Dimensions 64 × 32 × 35mm Warranty 2 Years What's Included 1 × Magicshine SEEMEE 400 1 × Seatpost Mount 1 × Saddle Mount 2 × Mounting Straps 1 × USB-C Charging Cable 1 × User Manual Ideal For Road cycling Commuting Endurance rides Group rides Night cycling Urban riding Long-distance touring Riders using ANT+ cycling computers