Uniden MHS550 Radio Owner’s Manual 23Using the external speaker/mic jackYou can connect an optional external speaker-mic to thiswatertight jack. Unscrew the cap, which is held by the rubbercap-keeper to prevent loss. Insert the special gasketed plugand screw down the shell, which assures prevention of waterentering the jack. Two available units areHHSPM Speaker MicVOX100 Headset MicFor details, consult your Uniden dealer or contact Unidendirectly (see back cover for contact information).Using the Marine VHF BandThe following features andoptions are avilable only whenthe radio is in the marine VHFband. To activate the marineband, press the BAND-1/2.5/5Wbutton repreatedly until thedisplay shows VHF.Reading the marine band screen••VHFVHFMemoryAlertTransmitpower(1W, 2.5Wor 5W)Current channel isstored in memoryStatusmessages(see statusmessagetable)CurrentchannelnumberChannel mode(USA, CANada orINTernational)Weather AlertWatch onCurrent bandBattery level iconMemoryAlertTransmitpower(1W, 2.5Wor 5W)Current channel isstored in memoryStatusmessages(see statusmessagetable)CurrentchannelnumberChannel mode(USA, CANada orINTernational)Weather AlertWatch onCurrent bandBattery level icon
