Send this bike computer back because it is of no use in the dark again. I have installed it without any problem and set everything went pretty easy the first test drive and it is working properly, the next morning then the surprise Tacho it light to set off and see as no function of the bicycle computer when I was the light, the noise source turn off goes the speedometer again. That, to me at a digital 3-channel wireless technology a nogo the LED light a pure bothers therefore back to Amazon.
