This bike USB warning lamp is bright and easy to be seen at night,warning other to keep distance.Fit for 12-26mm diameter seatpost,you can mount it on most bike.The one button operation design provide a simple operation,the taillight features 5 light modes,fit for your different needs.Duable housing can protect the light,battery and other inner parts,which can prolong its lifespan.Large capacity rechargeable battery,you can use the tailight for hours before it needs to be recharged.

Specification:Material: Plastic.Color: Black,red,blue.Size: 4.*4cm.Battery: Li-battery.(Built in)

NoteThere might be a bit color distortions due to different computer resolutions.There might be a slight errors due to different hand measurement.

Package included:1* Tail light.1* Rubber bracket.1* USB cable.