Wikipedia
KESU-LP is a low power television station, broadcasting on VHF channel 6 and serving the Kauai area. Inspired by KZND-LP in Anchorage, Alaska, former TV weatherman Jeff Chang began his own low-power station on the Hawaiian island of Kauai. Taking advantage of the station's audio signal broadcasting on 87.75 MHz, the station markets itself as a radio station and airs a mixture of Hawaiian music and lite AC music. KESU-LP is one of very few low-powered television stations that broadcasts as a radio station. This is possible due to a loophole in FCC regulations:
Sec. 73.653 Operation of TV aural and visual transmitters.
The aural and visual transmitters may be operated independently of each
other or, if operated simultaneously, may be used with different and
unrelated program material.
This means that KESU need not broadcast any particular image, as long as they broadcast a video signal. The video signal that they do broadcast shows information about the island of Kauai and various public service announcements. Along with the Hawaiian music and Lite AC format it also airs the Dickie Chang Wala'au show.
The station can be seen in its entirety on a traditional VHF antenna.