ROCKBROS Smart Sensing Front Bicycle Headlight QD-250LMWhen you need to fully concentrate on the road curves or the bumps in the track ahead without pressing buttons or switches, the ROCKBROS Smart Sensing Front Bicycle Headlight EOS220 could be the answer. With smart sensor technology, this ROCKBROS Front Bike Headlight adjusts to daylight conditions. As the sun sets, the light comes on. It even switches to full if you enter a tunnel alongside four light modes and the ability to charge via USB. You've