Sound Brick, Round, 9V 2 x 2 x 1 1/3 with Two Town Police Noises

Reference

4774c01

Sound Brick, Round, 9V 2 x 2 x 1 1/3 with Two Town Police Noises (part 4774c01) is a LEGO element. It appears in 8 sets, including Basic Building Set and Control System Building Set.