Sangean DT-210 Operating Instructions Manual page 8

Earphones and antenna
The earphones also acts as the FM antenna
when plugged into the earphones jack. While
listening via speaker, you may plug the
supplied wire antenna into the earphones jack,
and set the ST/MO/SP switch to the SP
(speaker) position.
ST/MO/SP(Stereo/Mono/Speaker)
1. Switch the switch to SP (speaker) position,
while you listen to the radio program via
speaker. Make sure to plug the supplied
wire antenna or the earphones to get best
FM reception.
2. This radio is capable of receiving FM
stereo radio program by plug the supplied
earphones into the earphones jack and set
the ST/MO/SP switch to ST (stereo)
position, display will show stereo symbol.
If the station being received is weak,
some hiss may be audible, to reduce the
hiss, switch the ST/MO/SP to MO(mono)
position. The stereo indicator will be
removed from the display.
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