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If there are no transmissions for 2 seconds, the unit will automatically switchto standby mode (display will turn off), which will save batteries (if used).When a transmission is received or if you attempt to send a transmission,the display will turn back on.For best results rotate the antenna to 90 degrees so that it is vertical or 180 degrees if the unit is mounted to a wall.To adjust the volume: press the Channel/Volume Up or Down button until the desired level (1 - 16) appears on the display.To select a channel: press the Menu button once and the display will blink. You have 7 seconds to change the channel. Press the Channel/Volume Up or Down until the desired channel is displayed. Press the Enter/Lock button when done.To set the beep:To transmit:To monitor:To send a Call Tone: