Radio Shack PRO-107 User Manual

The Main Power Cut-Off switch is only used to prevent battery drain 
when iSCAN is not used for long periods of time. Do not use the 
Main Power Cut-Off switch on a routine basis. 
Always press and hold   to turn off iSCAN before switching the 
Main Power Cut-Off switch to OFF and before removing the 
batteries. Failure to turn off iSCAN using   may result in data loss or 
corrupted memory on the SD card.

 Warning: The Main Power Cut-Off switch will not protect your 

For private listening, you can plug 

1

/

8

inch (3.5 mm) mini-plug

earphones or headphones (not supplied) in the HEADPHONE jack 
on top of iSCAN. This automatically disconnects the internal speaker.

In a noisy area, an amplified speaker (not included, available at
your local RadioShack or RadioShack.com) might provide more
comfortable listening. Plug the speaker cable’s 

1

/

8

inch (3.5 mm) mini-

plug into iSCAN’s HEADPHONE jack.

Do not wear headphones, earphones, or earbuds while operating a 
motor vehicle or riding a bicycle. This can create a traffic hazard and 
could be illegal in some areas. To protect your hearing, follow these 
guidelines:

•  Do not listen at high volume levels. Extended high-volume

listening can lead to permanent hearing loss.

•  Set the volume to the lowest setting. Then turn on your iSCAN

and adjust the volume to a comfortable level.

•  Avoid increasing the volume. Your ears will adapt to the volume

level, so a level that does not cause discomfort could still damage 
your hearing.

1.  Slide Main Power Cut-Off to the ON position.
2.  Press and hold  . 
3.  Turn SQUELCH to the midpoint (12 o’clock) position.

•

The higher the squelch is 

set, the stronger the signal 

required to break the 

squelch.

•

To hear weaker signals, 

turn SQUELCH 

counterclockwise to 

increase sensitivity

Lift  

cover