Emerson NR303TTC Owner's Manual page 7

Remove the opaque white plastic stylus cover from the phonograph stylus by
sliding it in the direction of the arrow.
STYLUS COVER
Discard the stylus cover.
Remove the twist-tie that was used to secure the tone arm during shipment.
Release the tone arm lock lever.
TONE ARM LOCK LEVER
Connect the plug to your AC outlet.
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