Dealzip Inc Set of 2 Wearable Led Running Waterproof Bicycle Outdoor Glow Bike Rear and Front Road Safety Flashing Night Lights Set of 2 Super Bright Bike Lights Mounts to Any Bike Quickly and Easily by Looping the Strong Silicone Loop around the Frame, and Hooking to the Light. Powered by 2 pcs CR2032 Batteries (included) Install or remove without any tools,easy to use 3 modes: steady, emergency flash, slow flash