10
Scanner Setup
Warning: Do not connect a charging adapter to 
the scanner if non-rechargeable batteries (such as 
alkaline batteries) are installed in the scanner and 
the switch is set to Ni-MH, or if you are unsure of 
the switch’s position. 
Connecting Headphones
For private listening, you can plug headphones 
(not included) into the headphone jack on top of 
your scanner. This automatically disconnects the 
internal speaker. Note that the sound is not in 
stereo.
Listening Safely
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.
• Even though some earphones/headphones 
let you hear some outside sounds when 
listening at normal volume levels, they still 
can present a traffic hazard.
Understanding Your Scanner
We use a few simple terms in this manual to 
explain the features of the scanner. Familiarize 
yourself with these terms and the scanner’s 
features, and you can put the scanner to work for 
you right away.