灰色3D线框电子设备模型

生成一幅灰度3D线框风格的技术模型图：一个矩形壁挂式电子设备，正面中央为大圆形扬声器网罩，网罩边缘有环形排列的网格线，右侧分布多个带防滑纹的圆柱旋钮，机身四周有矩形凹槽和带圆孔的安装耳片，整体表面覆盖三角网格线，呈浅灰色调，背景为纯净浅灰，采用斜侧前方视角、居中构图，柔和均匀光照，横向画幅。

Create a grayscale 3D wireframe technical model illustration: a rectangular wall-mounted electronic device with a large circular speaker grille in the center front, radial mesh lines around the grille, several knurled cylindrical knobs on the right side, rectangular recesses and mounting tabs with circular holes around the body, triangular mesh lines covering the entire surface, light gray tones, plain light gray background, angled front-side view, centered composition, soft even lighting, landscape aspect ratio.