OperationPush to talkNote : When you press and hold the PTT button, the signalstrength indicator will be displayed to confirm TX signalstrength Hi ( ) or Low ( ).Mode ButtonThis button is used to select various feature settings in your MK2000 GMRS Radio.buttonMode9OperationNote : After the MODE button is pressed, the Up( §) or Down( ')button must be pressed within 8 seconds, otherwise, the unitwill revert back to Normal mode.Selecting Main Channels (1-15)Your MK 2000 GMRS Radio has 15 main channels.To select the channel,Press the Up( §) or Down( ') button to select the desired channel.Push toselectchannel10

Radio Shack Genex MK 2000 Owner's Manual