HP COLOR LASERJET ENTERPRISE M555X PRINTER (7ZU79A) - Functions: Print, Print Speed: Up to 40 ppm, Resolution: HP ImageREt 3600, Pantone Calibrated, Memory: 2 GB, Display: 4.3-in (10.92 cm) Color Graphics Display (CGD) with touchscreen; rotating (adjustable angle), Connectivity: HP Jetdirect LAN Accessory 8FP31A, Paper Size: Tray 1: A4, RA4, A5, B5 (JIS), B6 (JIS), 10 x 15 cm, A6, 16K, envelopes (B5, C5 ISO, C6, DL ISO); Custom: 76 x 127 to 216 x 356 mm; Tray 2: A4, A5, B5 (JIS), B6 (JIS), 10 x 15 cm, A6, 16K; Custom: 102 x 148 to 216 x 297 mm; Optional Trays 3+: A4, RA4, A5, B5 (JIS), 16K; Custom: 102 x 148 to 216 x 356 mm, Paper Handling: 100-sheet multipurpose tray, 550-sheet input tray 2, 550-sheet media input tray 3, Operating Systems: Windows Client OS (32/64 bit)-, Win10, Win8.1, Win7 Ultimate, Mobile OS-, iOS, Android, Mac-, Apple® macOS High Sierra v10.13, Apple® macOS Mojave v10.14, Apple® macOS Catalina v10.15, Discrete PCL6 Printer Driver