The ornamental design for a rfidtag, as shown and described.
FIG. 1 is a perspective view of a RFID tag showing our new design;
FIG. 2 is a front elevational view of the new design;
FIG. 3 is a rear elevational view of the new design;
FIG. 4 is a right side elevational view of the new design;
FIG. 5 is a left side elevational view of the new design;
FIG. 6 is a top plan view of the new design; and,
FIG. 7 is a bottom plan view of the new design.
The broken line showing of mounting holes and compartment hatch on the back of the design is included for the purpose of illustrating portions of the “article” and forms no part of the claimed design.