Check the listing for details. APC PSP25 Isolated Loop Parallel Plus Serial Port Circuit Protector. Condition: Used. Listed at 16.99 USD. Protect your valuable electronic devices with the APC PSP25 Isolated Loop Parallel Plus Serial Port Circuit Protector. This surge protector is designed to provide reliable protection for your computer, tablet, or other electronic devices. Made in the United States, it features an isolated loop design that prevents noise and interference from affecting your equipment. With its powerful surge protection capabilities, the APC PSP25 is the perfect choice for anyone who wants to keep their electronics safe. Its serial port circuit protection ensures that even your most sensitive equipment will be protected from power surges caused by lightning strikes or other electrical disturbances. Don't take chances with your valuable electronics – choose the APC PSP25 Isolated Loop Parallel Plus Serial Port Circuit Protector today. F1BOX3