Here is a PSP also known as a PlayStation Portable PSP-120 remote control that has been fully tested and works. The only thing we noticed when testing it was that the volume minus button don't feel the same as the volume plus feels, but it works perfectly fine. The remote shows normal signs of use and wear as shown. 

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Sony PlayStation Portable PSP‑120 Remote Control Tested Works

Original Sony PSP‑120 remote control accessory for the PlayStation Portable system. This unit has been fully tested, with all buttons and audio controls responding properly. Ideal as a replacement or backup remote for PSP handheld systems.

Product Specifications

• Platform: PlayStation Portable PSP

• Model: PSP‑120

• Type: Wired Remote Control

• Color: Grey

• Connection: PSP Headphone/Remote Port

• Compatible With: PSP‑1000

Condition

• Functionality: Tested & Working — all buttons and controls responsive

• Shell: Light surface wear from normal use

• Cable: Intact — no cuts or fraying

• Brand: Sony OEM