Continuity mistake: When Charlie (in Marshall's body) goes to the final executive meeting, he dons a pair of glasses with an ear receiver attached by wires to one of the bows. When he removes the eyeglasses prior to leaving the meeting, the earpiece remains in his ear.
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Suggested correction: It was established when the salesman was talking about the device that the part attached to the glasses was the antenna and it came with a separate earpiece.
