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USA
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- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 29 - Aug 3
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Description
SF31 Bicycle Smart Brake Taillight USB Alerter Night Ride Ride Mountain Vehicle Turn LED Taillights, SF31 New Remote Control1. Press the remote control electric bell button to alert the surrounding pedestrians and vehicles to avoid 2. Anti theft alarm function, remove the remote control to arm when parking, scare off thieves 3. PC+UV material, waterproof and dustproof, high and low temperature resistance 4. Waterproof and dustproof structure, easy to install, suitable for all kinds of vehicles 5. Warning light will come on automatically when crossing tunnels or travelling
1. Press the remote control electric bell button to alert the surrounding pedestrians and vehicles to avoid
2. Anti-theft alarm function, remove the remote control to arm when parking, scare off thieves
3. PC+UV material, waterproof and dustproof, high and low temperature resistance
4. Waterproof and dustproof structure, easy to install, suitable for all kinds of vehicles
5. Warning light will come on automatically when crossing tunnels or travelling at night
6. Press the left and right turn button when you want to turn
7. Light braking, brake light will be on immediately
8. Remote control battery: built-in CR2032 button battery
9. Wireless distance: 50 to 60m in the open
10. Power supply: USB charging / built-in 18650 lithium battery
11. Function: warning + brake + steering + electric bell + anti-theft
12. Luminous flux: 160LM
13. Charging time: 7 to 8h
14. Usage time: flashing about: 70h constant light about: 35h
15. Transmitting and receiving frequency: 433.92MHZ
16. Battery capacity: 2000mah / 3.7v
17. Six warning tail light modes: slow flashing, breathing, flashing, constant light, emergency double flashing, tail light off
18. Operating ambient temperature: -40 to 60 degrees Celsius
19. Voltage: 3-4.2v
20. Current: 0.18A
21. Light source power: 15.5w
22. Dimensions: 125 x 49 x 29cm
23. Weight: 272g
Specification:
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Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.8 ★★★★★
Based on 11 reviews
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Product Reviews
★★★★★ 3
Unfortunate
Color: Black/Black/Digital Neg Display
It’s a cool new design but the night light button stopped working within a month of buying it. Shouldn’t happen with a 150$ sports watch
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Reviewed in the United States on June 27, 2025
★★★★★ 1
Garbage
Color: Black/Black/Digital Neg Display
Absolute garbage. The date that came up was from 2022. Most buttons did not work. Once you got into changing the time, etc, the watch locked up and would not get out of 'timer' mode. The watch lost 10 minutes in three hours. Do not purchase.
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Reviewed in the United States on March 25, 2025
★★★★★ 5
Great Watch
Color: Red
Beautiful and is well made. Because it's multi colored it matches everything.
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Reviewed in the United States on January 2, 2026
★★★★★ 1
Cheap buckle and band. Did not last one day
Color: Blue
Why did you pick this product vs others?:
Watch buckle is made of plastic that looks like metal. The watch band broke off the watch face 1 hour into my 12 hour shift. It LOOKS really cool. Love the Boho look, but the quality of the watch band and buckle are very cheap and not at all durable.
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Reviewed in the United States on July 10, 2025
★★★★★ 5
Quality of band bad
Color: Blue
Love the watch, the band unraveled within a week.
I ordered a magnetic band.
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Reviewed in the United States on January 12, 2026