Exposure Lights Sirius Mk8 and TraceR Mk2 Headlight and Taillight Set - The Sirius TraceR ReAKT Pack is the premium package with high power in a compact front light that is as at home in either a road race or lighting the urban commute and can be adapted easily with a choice of 7 programs as well as USB convenience as well as Smart Port , allowing the addition of optional accessories including Support Cells and remote switch.Ambient Kinetic Technology (ReAKT) enables the light to automatically flare under braking and when entering areas of higher ambient light to create a contrast in brightnessFeatures USB convenience and a choice of 6 burn timesDayBright flash pattern and side illumination for 360 degree visibility makes this an attractive package.Run times 1.5-36 hrs front, 3-24 hrs rearWhat's in the box?Sirius MK8, TraceR MK2 ReAKT Peloton, Handlebar Mount, Seatpost Mount, 2 X USB charge cable, Quick start guide