By the mid-1970s, the only stations broadcasting in black-and-white were a few high-numbered UHF stations in small markets, and a handful of low-power repeater stations in even smaller markets such as vacation spots. By 1979, even the last of these had converted to color and by the early 1980s, B&W sets had been pushed into niche markets, notably low-power uses, small portable sets, or use as video monitor screens in lower-cost consumer equipment. These black-and-white displays were still compatible with color signals and remained usable through the 1990s and first decade of the 21st Century for uses that did not require a full color display. The digital television transition in the United States in 2009 rendered the remaining black-and-white television sets obsolete; all digital television receivers are capable of displaying full color.