The Coolmax JD-550-M-500 483W ATX 12V Power Supply is a reliable and high-quality power supply unit designed for universal compatibility with a 12V voltage system. With a maximum power output of 483W and 20+4 pin connectors, it is suitable for various computer systems. The power supply also features AVR (Automatic Voltage Regulation) for stable voltage delivery and comes in a sleek black color. Tested for key functions, this unit is ready for resale and is a crucial component for keeping your computer system running smoothly.