Oricom ULTRA550, Руководство по эксплуатации

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When(PTT) is pressed at low battery, an error tone sounds and
transmission is disabled.
Once at low battery the unit will automatically shutdown.
Recharge the battery at any time. When the battery is empty, it will
take approximately 3 hours to fully charge.
Power On/Off
To turn on the transceiver, turn the volume knob clockwise until you
hear a click.
To turn off the transceiver, turn the volume knob fully counter-clockwise.
Volume
Rotate the Volume knob until you reach the desired level.
Channel Selection
Press the channel up or down buttons until you select the desired channel.
Transmission and Reception
To transmit, keep the PTT button firmly pressed and the red LED will
illuminate.
Wait for approximately 1 second and then speak in the direction of the
microphone, and hold the device at a distance of about 5cm from your
mouth.
When you have finished, release the PTT.
When the radio is in reception mode, you will automatically receive
communications and the green LED will illuminate.
MON (Monitor) Function
The Monitor button is used for temporarily opening the squelch,
in order to listen to signals that are too weak to keep the squelch
permanently opened.
For brief listening, press Monitor briefly to turn Squelch off, press
briefly again to turn Squelch back on.
Operations