To activate your Rainbow Lights Leg Warmers, press the button on the battery pack hidden inside the leg warmer. With each push of the button, choose from a multicolor flash, a slow color change, calm steady lights, or each indivdual color on a blink function. Height: 1.00 in. – Length: 1.25 in. – LED Color: 6 Red, 3 Blue, 3 Jade – Batteries: Includes 3 replaceable AG13 batteries. – Weight: 1.46 LB