No external power supply is required. The device is powered through the printer port, allowing normal operation without an additional power adapter. Durable black ABS case. Built to resist drops and wear for reliable daily use. Intelligent control chip for smooth operation. performance main controller enables stable performance, broad compatibility with different printers, and smooth switching to improve work efficiency. Two computers can share a single printer. Eliminates frequent plugging and unplugging when switching printing, protecting equipment and reducing office costs. Use scenarios Small office with a single shared printer. Two PCs can print without adjusting cables or reconfiguration, simplifying daily workflow. Home office with multiple workstations. Switch printing between computers quickly and seamlessly to support different tasks without downtime. Classroom or training environment. Two laptops can print as needed, minimizing setup time and reducing wear on equipment.