This is an **HP ProOne 600 G5** all-in-one desktop PC from HP (Hewlett-Packard). This is a listing for the main unit only, and since there is no power cord, its operation has not been confirmed. --- 【Information that can be confirmed (from the unit itself)】 ・Manufacturer: HP ・Model: HP ProOne 600 G5 ・Screen Size: 21.5 inches ・Type: All-in-One PC ・Input Voltage: 19.5V ・Model Number (P/N): 6AE31AV ※Detailed specifications such as CPU, memory, and storage are unknown.