It's not just a remote like previous wireless controllers. Revo has to track its position in three dimensions, plus its tilt, yaw and roll. I would be surprised if it didn't have at least one gyroscope in it (which aren't super expensive, but nor are they very cheap).BCampbell said:I'd be surprised if the Revolution controller base cost $50. The Wavebird cost $35. More than $40 for the Rev controller would be very surprising. The technology is fairly simple and common.