Dell D5YHR-RFB is a refurbished hard drive for adding data storage to a compatible SAS system. The listing identifies it as a 4TB SAS drive, providing capacity for files and other stored data.
Its 3.5-inch form factor and 7,200 rpm rotational speed are confirmed specifications of this model. The listing marks this particular item as refurbished. The source does not establish specific compatible systems or what accessories, if any, are included.