Material and build ABS plastic construction that is solid and durable, comfortable to handle, with antifingerprint and antiscratch properties. Key features and functions Three major functions: Dual USB plus dual frequency, providing two USB 2.0 interfaces, one start button, one restart button, and dual audio interfaces (input and output). Security and antitheft Internet Bar Antitheft: Uses a desktop mobile switch to lock the computer case by pressing the power on and restart buttons on the desktop mobile switch, preventing thieves who disassemble the machine from starting the system and accessing valuable components. Design and installation Practical design: Connects to the corresponding interface on the computer motherboard, and includes an antitheft block card on the extension line for added safety in an internet cafe environment. Extension cable length: 1.6 meters, providing flexibility to place the device anywhere on the desktop. Use scenarios Internet cafe security: Helps protect CPU, memory, graphics card, and other valuable components by preventing system startup if the machine is tampered with. Shared office or lab PCs: Enables secure, quick startup control and convenient peripheral access (USB, audio) from a central switch. Home workstation with multiple peripherals: Provides convenient USB ports and audio I/O plus a simple power/restart control, with a compact, durable enclosure.