1) Flashing on both sides or one side (the other side via plating surface) 2) Light source: Ultra Bright LED or Xenon Tube 3) Flashing frequency: 65 times/Min 4) Lenss color: yellow, red & amber 5) Base color: yellow, bule, green & orange 6) Power: 0.05W, Voltage: 6V 7) Visible distance: 500m-1000m 8) Built-in switch or external switch, frequent flashing/steady burning/OFF 9) Optional inside light control switch, flashing automatically at night time and close automatically at daytime 10) Power supply: Two batteries (6V 4R 25), available works with one.