FIG. 1 is a front perspective view of a wireless stethoscope in accordance with our new and ornamental design, wherein the broken lines form no part of the claimed design;
FIG. 2 is a front view thereof, wherein the broken lines form no part of the claimed design;
FIG. 3 is a rear view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof, wherein the broken lines form no part of the claimed design; and,
FIG. 8 is a bottom perspective view thereof, wherein the broken lines form no part of the claimed design.