Identification Model and serial numbers The model number and printer serial number are listed on an identification label located under the top cover on the right side of the printer. The model number is alphanumeric, such as C8049A for the HP LaserJet 4100 printer. The serial number contains information about the country of origin, the revision level, the production code, and production number of the printer. An example of a serial number is USBB123456. The label also contains power rating and regulatory information as shown in figure 1. Figure 1. Sample label 20 Printer description EN