The Whistler Group SC04 User Manual

Use the mounting bracket as a template to mark the 
locations for the two mounting screws.

Drill holes that are slightly smaller than the screws. 
Use caution not to damage wiring or components 
that are located behind the mounting surface.

Using the provided screws and lock washers, attach 
the mounting bracket to your vehicle.

Headphones and Speakers

You can plug headphones (not supplied) or an 
amplified speaker (not supplied) with a  
1/8-inch (3.5 mm) mini-plug earphone or in the 
headphone jack on top of your scanner. This 
automatically disconnects the internal speaker.

NOTE: Use an amplified speaker with this scanner; 
Non-amplified speakers do not provide sufficient 
volume for comfortable listening.

Listening Safely

To protect your hearing, follow these guidelines 
when you use headphones:

Set the volume to zero before putting on 
headphones. With the headphones on, adjust the 
volume to a comfortable level.

Avoid increasing the volume after you set it. Over 
time, your sensitivity to a volume level decreases, so 
volume levels that do not cause discomfort might 
damage your hearing.

Avoid or limit listening at high-volume levels. 
Prolonged exposure to high-volume levels can 
cause permanent hearing loss.

Wearing headphones while operating a motor 
vehicle can create a traffic hazard and is illegal in 
most areas. Even though some headphones let you 
hear some outside sounds when listening at normal 
volume levels, they still can present a traffic hazard. 
Exercise extreme caution!