Think of our led dot-ts but with readable data, scrolling text and a pov function (have to see it all on link) Its about 4" round and can connect via usb to a pc to program. Could be good for inside the show to display text usure of battery life at the moment. Can buy in the UK for £39 each.
buy in uk here.. http://www.kjglobal.co.uk/acatalog/Visual_Communication.html
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