XHZS-FM is a radio station in Mazatlán, Sinaloa, Mexico.
Broadcasting on 100.3 FM from a transmitter on Cerro El Caracol, XHZS is owned and operated by Luz Network as Stereo Uno with a pop format.
In May 2016, XHZS flipped from Radiorama to MegaRadio affiliation and consequently changed names from @FM to Switch, as the former is a Radiorama-specific brand.
In March 2020, Luz Network assumed ownership and operation of the station and began programming its Stereo Uno pop format; this gives Luz Network a presence in all three major Sinaloa cities, as it owns stations in Los Mochis and Navolato–Culiacán.
The Federal Telecommunications Institute approved XHZS-FM to begin broadcasting in HD Radio in 2022.