Radio Shack 21-1904 Owner's Manual page 4

4
Your radio also features:
• Channel Scan — use to find other
GMRS/FRS users.
• Key Beep — each time you press
a key, except PTT or FUNC, the
radio beeps once.
• Vibrate — vibrates for two
seconds when receiving a signal if
the radio has been idle for more
than 30 seconds.
• Voice Operated Transmission
(VOX) — enables standalone
usage and works with a hands free
accessory.
• Automatic Power Off — the radio
automatically turns off when the
radio is idle for 30, 60 or 90
minutes.
• Hi/Lo power selection — select
the transmit power 0.5W or 1.5W
for a GMRS channel.
• Courtesy Tone — at the end of
transmission, the radio (receiver
side) sounds a tone to confirm the
end of transmission.
• Caller ID— in the transmitter you
can select the receiver radio to
receive a call. In receiver, the radio
will receive the call that is