Feature:7 kinds of flash mode: Always bright、 flash、 slow flash、 left to right、 right to left and left to right slow flash、 flash、 flash back and forth2 laser lights remind someone else of keeping distance.This little laser beam tail light will ensure your safety while riding in the darkness.Working: depends on the batteries、Input Power: 1mWMaterial: ABS、 Acrylic & NylonPower: 2 x AAA batteries (not included)Size for 20-36mm tubeWarining:Laser Radiation Avoid Direct Eye Exposure!Keep out Reach of Children.7 Mode Bike Flash Light:5 LED Steady light5 lights all bright fast flash5 lights all bright slowly flashFlash from right to left slowly flashFlash from left to right slowly flashFlash from right to left fast flashSlowly flash in turns2 Mode Laser Light:Steady lightSlowly FlashPackage Contents:1 x Bicycle Laser Beam Rear Tail Light Lamp