The ornamental design for a blackbox for vehicle, as shown and described.
FIG. 1 is a bottom perspective view of a black box for vehicle showing our new design;
FIG. 2 is a front view thereof;
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;
FIG. 8 is a top perspective view thereof; and,
FIG. 9 is a right side view thereof showing an example of the usage of the subject design in which the black box is installed inside the vehicle (windshield).
The broken lines depict portions of the black box for vehicle that form no part of the claimed design. The environment of FIG. 9 forms no part of the claimed design and the dash dot line surrounding said environment forms a boundary of the environment that also forms no part of the claimed design.