from their site...
* Can be used with road, mountain or BMX wheels!
* 30 LEDs on each side (22 for BMX) x 256 radial pixels
* Runs on 2-3 AA batteries for 10 hours or more, assuming 3000mAh alkalines and 50% image coverage.
* Can run on rechargable NiMH AA's
* Comes with high-brightness red LEDs, but can be upgraded with green, blue, amber, etc.
* Automatically shuts off after 3 minutes
* wxPython based software runs on any Linux or Windows PC with a parallel port
* Design is all through-hole parts, perfect for a first time kit builder.
* With one spoke, total persistence at 15mph. Two spokes, 10mph. Three spokes, 7mph. (Assuming a mountain bike wheel). Looks cool even if not completely persistant.
* Great for safe riding at night, provides excellent side visibility.
* Playa-tested!
that last one there...*playa- tested- that says it all... burning man crap not meant to last longer than a week or 13 days, probably looks really cool after 2 weeks without sleep, but not doing anything for me right here and now...