... and rainproof.Two modes:fast flash,constant,off(change mode by pressing the ON/OFF button).It can be ... handle, seatpost, helmet, wheel, bag and so on.Flexible silicone surfaceSurface color: White,black,yellow,green,blue,red.Custom color ... /55Color: Red Safety Rear Light single LED,Super BrightConstant mode/Flashing modeSIZE:20mm-40mmUniversal fitsCAUTION/ATTENTIONCarefully install battries,make sure ...