User`s guide
12
Headphones and Speakers
You can plug headphones or speaker (neither included) into your 
scanner. 
To use headphones, connect the plug into the headphone jack 
on the front panel. Headphones automatically mute the scanner’s 
speaker. 
To use external speaker, connect the plug into the EXT SP jack on the 
rear panel.
Even though some earphones/headphones let you hear some 
outside sounds when listening at normal volume levels, they still can 
present a trafc hazard.
To protect your hearing, follow these earphone or headphones 
guidelines:
•  Do not listen at extremely high volume levels. Extended high-
volume listening can lead to permanent hearing loss.
•  Set the volume to the lowest setting before listening. Turn on 
the scanner, and adjust the volume to a comfortable level.
•  After you set the volume, do not increase it. Over time, your ears 
adapt to the volume level, so a volume level that does not cause 
discomfort might still damage your hearing.
•  Do not wear headphones while driving. This can create a trafc 
hazard and is illegal in some areas.
Keytones and Brightness
Your scanner features a backlit keypad and display for easy viewing 
and sounds a tone each time you press a key. 










