• Once 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.
Traffic Safety
Do not use an earphone or headphones with your 
scanner when operating a motor vehicle in or near 
traffic. Doing so can create a traffic hazard and could 
be illegal in some areas.
If you use an earphone or headphones with your 
scanner, be very careful. Do not listen to a 
continuous broadcast. Even though some 
earphones/headphones let you hear some outside 
sounds when listening at normal volume levels, they 
still can present a traffic hazard.
Connecting an Extension Speaker
In a noisy area, an optional extension speaker, 
positioned in the right place, might provide more 
comfortable listening. Plug the speaker cable's 
1
/8-inch (3.5-mm) mini-plug into your scanner's 
headphone jack. Your local RadioShack store carries 
a selection of suitable speakers.
Warning: If you connect an external speaker to the 
scanner's headphone jack, never connect the audio 
output line to a power supply and ground. This 
might damage the scanner.