\tFeature:\t1. This little laser beam tail light will ensure your safety while riding in the darkness. It has 5 LEDs and2 laser bulbs. 2. Waterproof. If you are still worried about how to protect your tail light in the rain， you can enjoy yourbike-riding with this Bicycle Safety Taillight even in a raining day. 3. Super convenient and easy to use，the light is small enough to fit into a pocket or small bag if youneed to take it with you. 4. It comes with easy to use mount for easy installation (no tools required) and 7 blinking modes fordifferent situations. 5. Use for jogging， walking， bicycles， car emergency， horse-riding， road emergency and camping， etc.\t6. 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 forth.2 laser lights remind someone else of keeping distance， add safety! This little laser beam tail light will ensure your safety while riding in the darkness.(Note : Do not look directly at laser lights) \t\tDescription : Material: Plastic Outer Color: Red， Blue， Green(For choice) Light Color: Straight (Type 3)，Cross (Type 2)，Starlight(Type 1)\tBattery: 2 x AAA battery (not included) Working time: about 9-36 hours depends on the batteries. Angle: 260 Installation:Using an adjustable buckle lock ring (for 20-31mm tube). Laser Input Power: 100mW Dimensions: 75x 70x 35mm (L x W x D) Weight: 64g\t\tPackage contents: \t1 XBicycle Laser Tail Light