Christmas Lights 2 Green & 2 Red Portable Marine LED Boating Lights - Bright And Sleak Led Bicycle Rear Light With Waterproof Silicone Body -Utilizes 2-LEDs to produce a bright light even at night; each light contains 5 15,000mcd LEDs Made of waterproof; quick and easy installation Universal Fitment For Oversize Road Bikes, Mountain Bikes, And Street Bikes, And All Need With 3 light modes that can be adjusted according to the lighting conditions Light is visible up to  mile for easy visualization of path when riding in the dark Brightest Led Bike Tail Light To Improve Safety With Increased Visibility From Cars.Includes 2 Li-ion batteries + Extra Pack of 8 Batteries