INNOLIFE Bike Lane Laser LED Cycling Mountain Road Bike Bicycle Taillight Safety Warning Flashing Lamp Alarm Light - 7 Mode 5 LEDs + 2 Red Laser Line 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 Waterproof, safer in water fog when riding in the rain Use for jogging, walking, bicycles, car emergency, horse-riding, road emergency & camping, ETC. Working: 9-36 hours depends on the batteries