Nextar 43LT Hardware Instruction Manual page 15

System Connections
Connecting to Earphones
You may connect earphones to the right side of the unit for
private listening.
When earphones are connected, the speaker will automatically
turn off.
 Note: Overly loud volume could damage your hearing. Turn
down the volume before you connect the earphones, and
then raise the volume to a comfortable level.
 Important: Most state and local laws prohibit the driver
from wearing earphones while operating a vehicle on public
roads.
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