The Blinky POV reprogrammable LED kit uses persistence of vision to create the illusion of text or a small picture floating in the air. Blinky POV is a standalone product and includes a pre-programmed microcontroller. This version allows you to change the text or picture by going to a website and simply holding the Blinky POV up to your monitor. Two squares on the web page blink to transmit the new message or animation to the Blinky POV microcontroller. It requires 2 AA batteries for use, and assembly requires a soldering iron and solder, a diagonal cutters, and optionally, a hot glue gun and wire strippers. Your choice of red or blue LEDs.