1. Double bright red laser line for your escort care line， draw your exclusive lanes. 2. Laser Safety taillights international safety standards Class IIIA level but do not direct the eye. 3. The five LED lights are really bright LED lamp， brightness super good. (Multi-mode switch) 4.7 easy to replace the battery at any time anywhere. 5. The special sturdy adjustable buckle， elasticity impact resistance， (generally applicable to the seat post 20-36mm diameter). 6. IPX2 waterproof standard， tilted 15 degrees raindrops waterproof. It allows you to change the status quo. 7. security power (the maximum power can work for 12 hours)， a laser flash method parallel line mode: Always， flashing， close， 5 LED， 7 flash modes: Always， flash， slow flash， left to Right slow flash， slow flash and right-to-left， left-to-right flash， flash back and forth about to close Package Included:1PCS Bicycle Rear Lamp and 1PCS snap sets(Without Battery)