Exposure Lights Switch Mk4 Rechargeable Headlight - Premium light geared to make commuting simple thanks to 220 degree visibility, quick release bracket and Micro-USB convenience.3-24 hr run timeDayBright flash pattern and side illumination for 360 ?visibility makes this an attractive package.Optimized Mode Selector provides multiple programs for choice of run times and modes so you can find the right one for your ride