The ornamental design for an in-ear device with microphone, as shown and described.
FIG. 1 is a top perspective view of an in-ear device with microphone of the 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 top plan view thereof; and,
FIG. 6 is a bottom plan view thereof.
In FIGS. 1 and 3 through 6, the broken lines representing environmental structures are for illustrative purposes only and do not form part of the design.