The ornamental design for a neckprotectiondevice, as shown and described.
FIG. 1 is a perspective view of the neck protection device;
FIG. 2 is a perspective view of the neck protection device;
FIG. 3 is a front view of the neck protection device;
FIG. 4 is a back view of the neck protection device;
FIG. 5 is a top view of the neck protection device;
FIG. 6 is a bottom view of the neck protection device;
FIG. 7 is a side view of the neck protection device;
FIG. 8 is a side view of the neck protection device; and,
FIG. 9 is a side perspective view of the neck protection device disposed with a user body.
The broken line showing of human head, neck, user body, helmet, chin strap and uniform is for the purpose of illustrating environmental structure and forms no part of the claimed design.