To activate your LED Poi Ball, press the button located on the flat, string side of the ball to go through 6 LED Functions, from multicolor flashing to color change and flashing single colors. Item sold ONE Poi Ball with String per piece. Does not come in pairs. LED Colors: Red, Blue, Green (They morph into each other to create other colors) Poi Ball Dimensions: Ball Diameter – 2.75″ String Length – 20″ Finger Holder Length – 3″ LED Poi Ball comes ready to use with 3 replaceable AG13 Batteries.