© 2004 RadioShack Corporation.All Rights Reserved.RadioShack and RadioShack.comare trademarks used byRadioShack Corporation.OWNER’S MANUAL —Please read before using this equipment.www.radioshack.com SMThank you for purchasing the RadioShack TRC521 CB Radio. It provides two-waycommunication on the citizen’s radio band and lets you tune to local and national weatherservice broadcasts. It provides the maximum legal power output for the greatest availablerange, and a built-in PLL (phase-locked loop) frequency synthesizer to reduce congestion.CB radio provides hours of fun and entertainment! Listen and talk to people from all over thecountry while traveling, and make new friends along routes that you regularly travel. It is also agreat way to keep informed of local emergencies, such as traffic accidents, road blocks,weather alerts and so on.UP/DN — Press or holddown to scroll up or downthrough channels.MicrophoneMounting BracketMicrophone HolderPTT — Push to talk. Hold downand talk into the microphonewhile transmitting.Mounting hardware suppliedfor the microphone holderand CB.CB/WX — Slide to CB touse and listen to citizen’sband radio. Slide to WX tolisten to local and nationalweather broadcasts.Connect the suppliedmicrophone here.RF GAIN — Rotate toimprove signal reception instrong signal areas. SeePage 6.OFF/VOLUME — Rotate towardsVOLUME to turn on your CB, and thenadjust to desired listening level. Rotatetowards OFF to turn off your CB.SQUELCH — Rotate to reducebackground noise (CB sensitivity).See Page 6.DUAL WATCH/ALERT TONE OFF —Press to activate dual watch (seePage 11), or to silence weather alerttones (see Page 10).CHANNEL — Rotate totune to a channel.TRC521 CB Radio! IMPORTANT !If an icon appears at the end of a paragraph, go to the box on that pagewith the corresponding icon for pertinent information.o — Warning — Caution Ô — Note21-1711