The HP LaserJet Pro 4003dn (model 2Z609A) is a robust monochrome laser printer engineered for medium to large workgroups needing high throughput. It prints up to 40 ppm on A4 (≈ 42 ppm in some regions), with first‑page‑out time around 6.3 seconds. Automatic duplex printing reduces paper waste while the standard input includes a 100‑sheet multipurpose tray plus a 250‑sheet input tray, with optional expansion via a third 550‑sheet tray. Connectivity includes Gigabit Ethernet, USB 2.0, and rear host USB; mobile printing is supported through the HP Smart app, Apple AirPrint, and Mopria. With 256 MB memory and a 1 200 MHz processor, it handles demanding print jobs with ease. Power consumption under active operation is about 495 watts, with very low power use in ready and sleep modes. A monthly duty cycle up to 80,000 pages makes it suitable for environments with heavy print loads.