I believe this is an old item. I don't know if it's for a laptop or a desktop PC. It's a bit large and heavy, probably 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 that it works when connected to a Toshiba (now Dynabook) laptop. Also suitable for digital amplifiers. --- Below is a Mericari 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.