... 4..150 mins(100% bright) 5.CE,ROHS,UL-STR bicycle lights Operation Modes: The initial short press of the button ... .2Rated current (mA)8800Head Diameter (mm)47Length(mm)42Battery4PCS 18650WaterproofIP65 bicycle lights li-ion batery(CE,ROHS,ISO,UL-STR)