A remote-control toy car set includes a toy car, and a remote-control device. The invention is premised on the discovery that the USP Disintegration Test and modified versions thereof are far more predictive of the in vivo release profile for a controlled release dosage form than is the standard USP Dissolution Test, particularly controlled release dosage forms of the swellable, erodible type. The second multiplexing section is used for wavelength-multiplexing both the excitation light from a second Raman excitation light source, which distributively amplifies an S+ band included in light propagating through an optical fiber, and the light propagating through the optical fiber. The system is composed of both hardware and software. The intermediate end user equipment receives and sends signals tofrom the base station over the FDD using the FDD transceiver and relays them via the FDDTDD interface and the TDD transceiver towards a relevant one of the other end user equipments over a TDD. A keeper is mounted within a void in the body to facilitate the releasable securing of the radiation shield within the cavity.