9V battery connection. Seems like alot of demo boards are doing this now, makes it nice when you don't want to mess with the wallwart or other stuff. Course you might need a box of batteries as well __________________________________ Yahoo! Mail Mobile Take Yahoo! Mail with you! Check email on your mobile phone. http://mobile.yahoo.com/learn/mail -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist