I believe this is an old item. I'm not sure if it's for a laptop or a desktop PC. It's a bit large and heavy, likely due to its age. The plug's outer diameter is approximately 5.5mm. It's in relatively good condition for its age. The power cable is missing. Please provide your own. I have confirmed it works by connecting it to a Toshiba (now Dynabook) laptop. Also suitable for digital amplifiers. --- Below is a Merari AI-generated description --- TOSHIBA AC/DC adapter, model ADP-75WB, output 19V 3.95A, UL certified. - Brand: TOSHIBA - Model: ADP-75WB - Voltage: 100-240V - Output: 19V 3.95A - Plug Type: Circular - Safety Standards: UL Certified - Part Number: PA5034U-1ACA Thank you for viewing.