Modes 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 Modes Laser Light:Steady lightSlowly Flash Warning: Laser Radiation Avoid Direct Eye Exposure!Keep out Reach of Children. Specifications:Battery: 2 x AAA batteries (Not included)Working Time: 9-36hoursMaterial: ABS， Acrylic & NylonFor 20-36mm tubeInput Power: 100mW Package Included:1 x 5-LED 2 Laser Beam Bicycle Tail Light1 x Installing Mounts