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Description
SeeMee 400 Smart Motion Sensor - OptiTracing - ANT+Looking for an upgrade in visibility and control? SEEMEE 400 takes everything great about the SEEMEE 300and turns it up a notch. With higher output, expanded visibility, smarter syncing, and deeper integration, its built for road cyclists and urban riders who expect more from their taillight. 360 Visibility, Trusted by Pros Both SEEMEE 300 and SEEMEE 400 feature Magicshines signature OptiTracing light, projecting a 360 glowing halo onto the road for
Looking for an upgrade in visibility and control? SEEMEE 400 takes everything great about the SEEMEE 300—and
turns it up a notch. With higher output, expanded visibility, smarter syncing, and deeper integration, it’s built for road
cyclists and urban riders who expect more from their taillight.
turns it up a notch. With higher output, expanded visibility, smarter syncing, and deeper integration, it’s built for road
cyclists and urban riders who expect more from their taillight.
360° Visibility, Trusted by Pros
Both SEEMEE 300 and SEEMEE 400 feature Magicshine’s signature OptiTracing light, projecting a 360° glowing halo
onto the road for all-around visibility—a favorite among pro cyclists for its unmistakable presence in low light
condition. The Optillumin lens remains the same across both models, offering powerful rear and side illumination
through a compact, clean design.
Instant Boosting Alert
Both SEEMEE 300 and 400 feature brake detection—but SEEMEE 400 pushes it further with an instant 400-lumen
burst triggered by an upgraded motion sensor. It reacts faster and brighter, giving traffic behind more time to
respond and enhancing safety at every brake.
Next-Level Connectivity and Control
As Magicshine’s flagship taillight, SEEMEE 400 brings unmatched integration and coordination to your ride.
PelotonSync Flash lets multiple lights flash in unison—automatically syncing with nearby compatible Magicshine
taillights. Your group appears as a unified presence, boosting visibility and cohesion on the road.
FTR LightSync Control links seamlessly to the MJ-6558 remote for front-rear control at the push of a button. Prefer
cockpit integration? The SEEMEE 400 connects directly with Garmin, Wahoo, and Hammerhead bike computers via
ANT+—giving you effortless control right from your handlebars.
Built for Every Ride
SEEMEE 400 delivers up to 107 hours of runtime, USB-C fast charging, and a lockout function to prevent accidental
activation. Its IPX6 waterproof rating ensures all-weather reliability, while the quarter-turn mount offers quick, secure
installation on seatposts or saddle rails.
SEEMEE 400 is not just a brighter version of SEEMEE 300—it’s a smarter, safer, and more connected evolution. For
riders who go farther and ride smarter, it’s the taillight that keeps pace.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.5 ★★★★★
Based on 17 reviews
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Product Reviews
★★★★★ 1
JUNK
Color: Paperclip - Gold, Size: 7 inch
Really small & tight if you have a normal size rest it won’t fit.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 8, 2022
★★★★★ 1
Don’t buy, gold is wearing off.
Color: Paperclip - Gold, Size: 7 inch, Color: Paperclip - Gold, Size: 7 inch
It’s a nice sturdy bracelet; however, after having had for less than 2 months the gold is wearing off. Not happy. Too late to return. So I would not recommend purchasing.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 21, 2021
★★★★★ 1
Do not buy in advance because they won’t size it!
My husband ordered this ring a month ago & gave it to me & it doesn’t fit. I need a bigger size. I took it to a jewelry store to get it larger & they told me they don’t think it’s solid gold. I can’t get it larger! I think if you want to exchange a ring after a month they should honor it for size as I never wore it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 7, 2025
★★★★★ 5
Love!!!
Gem Type: Ruby, Ring Size: 7
Stunning!! I love the style of this ring. It looks beautiful in person❤️
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 14, 2025
★★★★★ 4
Taller and wider than I expected
Gem Type: Ruby, Ring Size: 6, Gem Type: Ruby, Ring Size: 6
My ring came in with some small scratches on the middle stone. I read in the description that you could receive a stone that is “cloudy” so I am lucky that my stones are free of any cloudy spots. I’m sure it will get some small scratches as I wear it. The ring sits up high on your finger and it’s wide enough to keep your hand from being closed all the way leaving your pinkie sticking out. I tried to capture that in my pictures. Overall I am happy with the ring. I just wish I knew how wide and tall it was before I bought it so I’d know what to expect. The stock photos don’t give any views of the side of the ring.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 23, 2026
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