The ornamental design for an in-ear device, as shown and described.
FIG. 1 is a top perspective view of an in-ear device showing our new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a left side elevational view thereof;
FIG. 4 is a right side elevational view thereof;
FIG. 5 is a bottom plan view thereof; and,
FIG. 6 is a top plan view thereof.
The broken lines in the drawings representing environmental structures are for illustrative purposes only and do not form part of the claimed design. In all Figures, the wire is drawn broken away in order to indicate that a specific length of wire forms no part of the claimed design.