A spinal implant having at least two bone anchors includes a longitudinal connecting member assembly having hard, non-elastic sleeves for attachment to the bone anchors, at least one spacer located between the bone anchors, and in some embodiments, an end elastic bumper and cord blocker. Mounted in the main holder unit are inner contact pieces coming into contact with output terminals of the microphone when it is being held outer contact pieces coming into contact with inner contact pieces of first or second intermediate terminal members, and first and second terminal members formed from base sections connected at their bottom ends in a V-shape. The interconnector includes a synchronizationcompaction block to control traffic provided from a master device to a slave device. The spokes may be resiliently or pivotally mounted to the wheel.