FIG. 1 is a front perspective view of a handheld wireless keyboard showing the design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a front elevational view thereof.

The broken lines are shown in FIG. 6 for illustrative purposes only and form no part of the claimed design.