-Press the MODE button 4 times (3 times for FRS) until the Vo icon appears on the display accompanied by the flashing numeral 1 or 2.
-Press the Up or Down button to select the 1 or 2 VOX level sensitivity.
-Press the PTT button momentarily to confirm the VOX selection.
-The 
icon only appears when the VOX mode is enabled.
Dual Watch Mode
This feature allows you to monitor two channels at the same time. While in dual watch mode, the unit will continuously monitor both the primary and dual watch channel. Received signals will be played for 5 seconds, then the unit will resume scanning the two channels. Pressing the PTT button during a received transmission will set the unit to transmit on the same channel. Pressing the PTT button when no signal is received will set the unit to transmit on the primary channel.
To set the Dual Watch Mode:
-From GMRS/FRS standby mode, press the MODE button 5 times
(4 times for FRS); 
appears flashing on the display. If the dual watch mode is off, the oF icon will also appear flashing.
-To enable the dual watch mode, press the Up or Down button; the dual watch channel number will flash and start to increase or decrease as the Up or Down button is pressed.
-To select a subcode for the dual watch channel, press the MODE button while the selected dual watch channel is flashing. Then use the Up and Down buttons to select the desired CTCSS subcode.
-Press the PTT button momentarily to confirm selection of the dual watch channel. The display will now alternate between the primary channel and the dual watch channel just selected.
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