FIG. 1 is a left front perspective view of a necklace Bluetooth communication apparatus showing my new design;

FIG. 2 is a left front perspective view of the right ear bud thereof, shown separately for purposes of illustration;

FIG. 3 is a front view of the right ear bud;

FIG. 4 is a rear view of the right ear bud;

FIG. 5 is a left view of the right ear bud;

FIG. 6 is a right view of the right ear bud;

FIG. 7 is a top view of the right ear bud;

FIG. 8 is a bottom view of the right ear bud;

FIG. 9 is a right front perspective view of the left ear bud thereof, shown separately for purpose of illustration;

FIG. 10 is a front view of the left ear bud;

FIG. 11 is a rear view of the left ear bud;

FIG. 12 is a left view of the left ear bud;

FIG. 13 is a right view of the left ear bud;

FIG. 14 is a top view of the left ear bud;

FIG. 15 is a bottom view of the left ear bud;

FIG. 16 is a front elevational view of the vibrator and Bluetooth housing for a necklace Bluetooth communication apparatus shown separately for purposes of illustration;

FIG. 17 is a rear view of the vibrator and Bluetooth housing part of the apparatus;

FIG. 18 is a left view of the vibrator and Bluetooth housing part of the apparatus;

FIG. 19 is a right view of the vibrator and Bluetooth housing part of the apparatus;

FIG. 20 is a top view of the vibrator and Bluetooth housing part of the apparatus; and,

FIG. 21 is a bottom view of the vibrator and Bluetooth housing part of the apparatus.

The broken lines form no part of the claimed design.