JapanSportX Q4 Smart Brake Tail Light: Braking sensor
For cyclists who ride in low-light conditions, this smart brake light ensures you're visible and safe. It's not just about being seen; it's about proactive protection with automatic braking and vibration alerts that activate before you even think to signal.
The braking sensor detects deceleration instantly, brightening the light to warn traffic behind you. You'll appreciate how the vibration sensor keeps it on during bumpy rides, so it never turns off accidentally. With up to 80 hours of battery life in economical mode, it lasts through weeks of commutes without a recharge. Its lightweight design at 23 grams won't weigh down your bike, and the Type-C charging makes powering up quick and easy.
Features
- Vibration sensor
- Automatic on/off
- Memory function
- Automatic sleep mode
- IPX6 waterproof
- Braking sensor
General specs
- Brand: JapanSportX
- Model: Q4
- Seller: Joom
- ID: 68d371d52dbf13016213f420
- Material: Aluminum
- Light Type: LED
- Battery Life: 80
- Number of Modes: 5
- Water Resistance: IPX6
- First listed by seller: 11/15/25
If you are interested in more details, you can find full information on the seller's page.
Shipping options
United States
Comparison with similar products
| This item | Recommendations | |||||
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JapanSportX Q4 Braking sensor
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NUNET apple01 Black
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| Brand | JapanSportX | NUNET | BIKIGHT | XANES | LAOTIE | |
| Model | Q4 | apple01 | LIG019 | SFL 01 | X8 | |
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| Price | $52.34 | $35.99 | $24.83 | $14.80 | $14.89 | $19.86 |
| Seller | Joom | Amazon | Banggood | Gshopper | Banggood | Banggood |
| Update | January 10, 2026 | December 9, 2025 | January 7, 2026 | July 25, 2024 | January 7, 2026 | January 7, 2026 |
| Weight | 0.37 pounds | 0.15kg | 118g (headlight), 20g (taillight) | |||
