In order to upload images to your SpokePOVs you will need a SpokePOV dongle kit which is not included. You will also need a magnet to attach to your frame that will trigger the SpokePOV. Buy one here or use your own!
Available in red, yellow, and blue. All colors can be used in MTB/road wheels (9.5" wheel radius minimum) and red and yellow in BMX (6.5" wheel radius minimum).
The Pacman/Ghost image shows a yellow set and blue set of SpokePOVs. The Biohazard image below shows a set of red.
To use with BMX/Unicycle/kid's sized wheels, you'll have to cut the PCB yourself, read the instructions at the assembly webpage.
One single SpokePOV fits in one wheel, you can add as many SpokePOVs to a wheel as you'd like get a better image. With one spoke, persistence at a speedy 15mph. Two spokes for cruising at 10mph. Three for a leisurely 7mph! Read more about specifications, full instructions, usage, etc. at the SpokePOV webpage.