Did a search and didn't see anything about these. I received a solicitation this morning from one of my suppliers for a pair of USB Speaker heads modeled on Optimus Prime (with a repaint into Ultra Magnus). It appears that each set is a self-contained stereo pair. Based on the product code, these are a Hasbro product, not a Takara release, so we may see these in some US brick and mortar shops in the near future. No SRP is given, only a wholesale price. Based on the wholesale price, these would probably run somewhere between $30 and $40. Size is roughly 10.25 x 7.25 x 5.25 inches.