Audiovox FR-230 - Manual (Page 9)

Function Select Button
Pressing this button will allow selection of the channel number.
This will be indicated by the slow flashing of the channel number
display and will be confirmed with a beep tone. If no buttons are
pressed for 5 seconds, the unit will return to standby mode and
the channel display will turn off. Pressing the function select
button again or pressing the P (Push To Talk) or monitor buttons
will also return to the standby mode. A beep tone will indicate
that the unit has returned to standby mode
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USING YOUR FR-230
Turning the Transceiver on
Pressing the power button for 2 seconds will activate the unit.
The speaker will play a conformation beep tone to confirm the
transceiver’s activation. To turn the unit off, simply press and
hold the power button for 2 seconds. The unit will confirm its
shutdown with another beep tone.
Button Conformation Tones
Whenever, the up, down or function select buttons are pressed,
the speaker will play a tone to confirm each press. When adjusting
the volume or channel number, the tone will correspond to the
current setting, the lower the tone, the lower the setting. A unique
tone will indicate that the limit of adjustment has been reached.
Low Battery Alert
When the batteries are in need of replacement or charging, the
low battery indicator LED will flash once every ½ second and the
transceiver will sound a double beep to alert the user.