guee AERO-X Motion Sensor Rear Light
- Auto motion sensing: the rear light gets brighter to signal to other cyclists or cars behind you.
- Auto power saving: turns off after idling for 60 seconds, reactivates after riding again.
- Low power warning: the tail light automatically switches to flash mode if the power falls below 20%.
- Wide and bright lampshade angle for increased visibility to the rear, left & right sides.
- Fits with both aerodynamic (e.g. Venge, Propel, S5) and round seat posts.
- Compact & tool-free mounting system.