On/Off button conveniently located on the side of the clip. Press once to keep the LED light steady at all times; press twice to activate flashing mode; press again to turn the LED off. 2 Lighting Modes: Steady & Flashing. Quickly and easily attaches to the heel of your shoe. Ideal for Running, Cycling, Shopping, Climbing, Walking etc. Not recommended for leather dress shoes. Includes CR2032 batteries.