The Light Up Hula Hoop - 35" LED is a whirling, dizzying, raging hoop of fun and dance! Raves, nightclubs, bars, street events, concerts, festivals...buy, sell, give away, do what you will, but there is no substitute. The Light Up Hula Hoop - 35" LED has multicolor capabilities and a wide array of light patterns. To activate, switch the button on the side of hoop to "On" and watch the patterns morph, change, and dazzle. You cannot choose which function, it does it automatically. Features 26 red, 26 blue and 26 green LEDs. Comes with 2 replaceable AA batteries. To change batteries, press the battery release button and pull the hoop apart at the separator.