Light up the night right where you need it with the Nite Ize SpotLit LED Collar Light. Set in a lightweight stainless-steel carabiner, it attaches to nearly everything – key rings, jackets, dog collars, or nearly anywhere else. The long-lasting LED provides ambient glow bright enough to read fine print or find the keyhole in your car door. Selectable modes for either steady glow or continuous flash. Weather-resistant, long-life with replaceable batteries. Runs on two 2016 3-volt lithium batteries (included). Runs 20 hours on glow mode, 25 hours on flash mode.