Standard Horizon HX380 Owner's Manual page 16

[ ( UP )] Key
Press the key momentarily to increase the channel one step. Hold the key
down to increase the channel continuously.
Secondary use:
Used to adjust the squelch threshold level up after the [ SQL ] key is pressed.
[ ( DOWN )] Key
Press the key momentarily to decrease the channel one step. Hold the key
down to decrease the channel continuously.
Secondary use:
Used to adjust the squelch threshold level down after the [ SQL ] key is
pressed.
[ SQL ] Key
Press this key to activate the squelch adjusting mode. Press the [ ] or [ ]
key to adjust the squelch threshold level.
Press and hold this key for two seconds to open the squelch, allowing you
to monitor the operating channel. Release the key to resume normal (quiet)
monitoring.
[ SCAN ( DW )] Key
Starts scanning and priority scanning of programmed channels.
Secondary use:
Press and hold the [ SCAN ( DW )] key for two seconds to activate the Dual
Watch feature.
[ CLR ] Key
Press to stop the Scan, Priority Scan, or Dual Watch feature.
Secondary use:
When the [ 16/9 ] key is held and the [ CLR ] key is pressed, the radio will
change the marine band between the International, Canadian, and USA
channels.
Speaker
The internal speaker is located here.
Microphone
The internal microphone is located here.
When transmitting, position your mouth about 1 ~ 2 cm away from the
small mic hole. Speak slowly and clearly into the microphone.
Battery Pack Lock ( Bottom side )
Slide the Battery Pack Lock to the " " position for battery removal.
Page 16 HX380