The ornamental design for a wireless smarttag, as shown and described.
FIG. 1 is a front perspective view of a wireless smart tag;
FIG. 2 is a front plan view thereof;
FIG. 3 is a rear plan view thereof;
FIG. 4 is a right side elevational view thereof, the left side elevational view being a mirror image;
FIG. 5 is a bottom plan view thereof; and,
FIG. 6 is a top plan view thereof.
The broken line showing of an attachment mechanism and electrical charger contacts is for the purpose of illustrating environmental structure and forms no part of the claimed design.