The Bestec ATX-250-12Z D7R 250W ATX Desktop Power Supply is a silver power module designed for HP systems, specifically compatible with the model 5188-2622. It features a 20 pin connector and a maximum power output of 250W, making it suitable for powering ATX desktop computers. With a cooling fan and a compact ATX form factor, this power supply is reliable and efficient for meeting the power needs of your system. Built by Bestec and manufactured in China, this unit is a quality component for maintaining your computer's performance.