The Ikzi Light wheel light consists of 16 LED lights in 4 colors. You simply clamp the wheel light between the spokes of your bicycle. Press the on/off button for three seconds and the light will turn on. The light will blink with movement and every 4 seconds a new pattern is created, which is only visible when the wheel is turned. The patterns show up best at a speed of 15 to 20 km. The wheel light comes with 3x AAA batteries included. This beautiful light should not be used instead of the legally prescribed lights. Specifications: Color: 4 different colors Material: plastic Light source: 16 Led