Acer Veriton X2680G SFF you are describing is a refurbished business desktop PC featuring an 11th Gen Intel Core i5-11400 processor, 8GB of DDR4 RAM, a 256GB SSD, and Windows 11 Pro, typically offered with a 6-month warranty. 
 

Processor	Intel Core i5-11400 (6 Cores/12 Threads, 2.6 GHz base, up to 4.4 GHz boost)
Form Factor	Small Form Factor (SFF), dimensions approx. 102 x 305 x 330 mm
Memory	8GB DDR4 SDRAM (expandable up to 64GB)
Storage	256GB M.2 PCIe NVMe SSD
Operating System	Windows 11 Pro (upgraded from original Windows 10 Pro)
Connectivity	Gigabit Ethernet, optional Wi-Fi 6 and Bluetooth 5.1
Ports	Multiple USB 2.0 and USB 3.2 ports (Gen 1 & Gen 2), HDMI, DisplayPort, VGA, audio jacks
Graphics	Integrated Intel UHD Graphics 730