20 LEDS can be seen for up to a mile with up to a 7 hour runtime on 4 AA batteries (not included). Five stage switch provides all red, all blue, red/blue alternating, red/blue blend or flashlight options. Provides all weather visibility day or night. Has built in magnetic mount tailcap for placement anywhere on vehicle. Kits Include 2 or 4 lights,padded case and 8 weighted rubber disc for ground placement.