复古红色工业警报器正面特写

复古工业风3D写实渲染，正面居中的红色金属警报器/扩音喇叭，上部为黑色大型圆形号角，中央有银灰色圆顶振膜，两侧各有一根细金属护丝；下部为红色金属箱体，阶梯状上沿、圆角边缘，表面有明显划痕、掉漆和做旧痕迹，并有数颗铆钉或螺栓；浅灰白色纯净背景，产品图构图，正面平视，均匀柔光与轻微高光，3:4竖幅，无人物，无文字。

Retro industrial style 3D realistic render, front-centered red metal alarm siren/loudspeaker, upper part a large black circular horn with a silver-gray dome diaphragm in the center and thin metal guard wires on both sides; lower part a red metal box body with stepped top edge, rounded corners, visible scratches, chipped paint and distressed wear, with several rivets or bolts; clean light gray-white background, product-shot composition, straight-on front view, soft even lighting with subtle highlights, 3:4 vertical aspect ratio, no people, no text.