Using two of the latest high intensity lumileds leds and incorporating both wide and narrow angle beams the blinder road 250 floods any street in light giving cyclists total night vision whilst being visible to others at over 1000m accessories included helmet mount 2x interchangeable straps for front light usb charge cable light output 250 lumens dimensions 53 x 30 x 63mm weight75g storage mode to activate storage mode make sure light is first turned off then hold down the onoff bu