6 modes: steady, fast flash, slow flash, chase in slow, chase out slow, chase in fast. Clips onto belts, dog collars, backpack straps and more. Lightweight and small, this item is great for runners, cyclists, and anyone else who needs to be visible in low light conditions. Includes 2 AAA batteries. Optional accessory kit includes tail light mount and elastic/velcro leg and armbands.Please note that All Safety Lights from Fun Source flash RED regardless of the color of the plastic casing.