A 3D model of a cash register, featuring a sleek black design with integrated touchscreen, keypad, and receipt printer. It has a modern functional aesthetic and is suitable for retail point-of-sale transactions.

A 3D model of a Warning Light, featuring a gray metal panel with a red circular light, screw-fastened edges, and horizontal grooves. It has low polygon count and high detail, suitable for industrial warning, safety标识, and 3D product visualization.

A 3D model of a mechanical device, featuring a circular top, central hole, and radial base, with a modern industrial aesthetic. It has a highly polished metallic finish, smooth surface, and is suitable for tech exhibitions and product design references.

A 3D model of a step ladder, featuring a metal frame, wooden steps and handrail, with a modern minimalist aesthetic. It has a low-poly design and is suitable for home use and daily maintenance. (Note: Corrected category from "Other" to "household step ladder" as the core object is a practical, home-related item.)