How are these units legal?

The FCC regulates all consumer products that transmit or leak radio frequency into the air (Part 15 of the FCC code). Since the scrambler and the combination units do not transmit but merely act as a reflective receiver they are legal under the FCC regulations. Regarding the laser scrambler, there are no Federal laws against transmission of infra red light, so the laser – scrambling portion is legal as well. And, all the units are FCC certified (except for the S201 – Phazer II and Phazer 3).