By Mathematica (21/11/2017)
The flashing "bracelet" is a good trouser leg clip to step your trouser leg from getting caught in the chain. But it is also highly visible because (a) it flashes and (b) it is moving with your leg. The eye is very sensitive to changing light.
By John Hughes (13/12/2016)
Excellent light from this bracelet. Would recommend to runners etc
By Douglas Milsom (08/10/2015)
Haven't used them yet, but they seem pretty good.