Two-color LED Bike Tail Light Flasher Be safe - be seen while enjoying outdoor activities - biking, running, walking, skateboarding Almost impossible not to see - 5 super-bright LED, red & amber lens and 7 light patterns Includes quick-release mount for bike handlebar or seat post plus belt/pocket clip Durable ABS & polycarbonate material, weather-resistant silicon seal 2 AA batteries (not included); light function switch