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3.4 Installing the Additional Speaker/Microphone (Optional)
a. Use a flat-blade screwdriver to unscrew the screw at the lower end of the cover counterclockwise to remove the headset
cover.
b. Insert the protruding part of the lower end of the headset into the slot indicated by the arrow in the figure below, and
then align the nut on the upper end of the headset with the corresponding threaded hole of the transceiver and rotate it
clockwise until it is tightened.
NOTE: Please install accessories correctly; otherwise the waterproof performance of this product may be affected.
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