http://mybeatbuddy.com/product/beatbuddy-mini/?mc_cid=457a548f59&mc_eid=df4071ebca http://mybeatbuddy.com/product/beatbuddy-mini/?mc_cid=457a548f59&
I have no such information available to me currently, but most likely it is DC (judging on the board the main BeatBuddy is assembled on).