An optical transceiver includes a multi-layer printed circuit board comprising a plurality of layers and a first electric circuit and a flexible printed circuit board comprising a second electric circuit in connection with the first electric circuit. Thus, in one embodiment, golf fitting includes collecting data related to the golfer’s swing and determining if the golfer’s swing technique should be modified based at least in part on the collected swing data. The portion of the compressed bitstream associated a selected region is decoded. The performance of a user’s response to actionable content is tracked and monitored so that future content can be tailored to a user’s performance. The second opening is adjacent to the first opening.