Guee AERO-X Motion Sensor Rear LED Bike Light

The Aero-X is a bicycle tail light designed to ensure you're seen both day and night. Equipped with motion-sensing technology which kicks in by doubling the brightness when you're slowing down or riding in rough terrain. A clever power saving feature extends the run time, turning itself off after idling for 60 seconds, with auto-reactivation when your start riding again.

Featuring Guee's most versatile function, the Aero-X easily mounts on round and aero seat posts. A great improvement for your road safety!


  • 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.
  • Specification:

    • Lumen output: 60 lumens.
    • Modes: Flash/strobe/constant.
    • Battery: Li-Poly rechargeable (500mAh).
    • Charger: Micro USB supply 5V.
    • Charge time (approx): 2.5 hours.
    • Run time (approx): 50 hrs (flash) / 20 hrs (strobe) / 8 hrs (constant).
    • Mount size: Round tube (27.2mm – 35mm ) and any aero tube with outer diameter under 14cm.
    • Weight: 30 g.