- What's in the package for D4s?
- Is D4s easy for me to replace the accessories myself?
- Can I ride the D4s when it rains?
- Speaking of the shifting system, what's so special about D4S?
- How fast can I ride the D4S?
- Is D4S heavy to carry?
- Does D4s easy to charge?
- I hope that cycling can save more effort, how to achieve it for D4S?
FIIDO D4S
Quick answers to frequently asked questions about FIIDO D4S