Compatibility - Dell Latitude E5550 E5570 5580 5590 5591 and Precision 15 series including 3510 3520 3530 7510 7520 7710 7720 Installation notes - This keyboard is compatible with multiple models; installation may require folding the ribbon cable along the designated fold lines to fit. Layout and features - Keyboard layout: QWERTY US-INTL with Backlit (frame not included) - Plug in connectivity - Language: English - Color: Black with White letters - Includes center stick pointer (trackpoint) Part numbers - DP/N: N7CXW, 0N7CXW, CN-0N7CXW; 383D7, 0383D7, CN-0383D7 - Manufacturer Part Number(s): SX157025A-US, PK1313M3A00, V147025AS1, NSK-LL0UC 01, PK1313M4A00 Use scenarios - Scenario 1: Replacing a worn or nonfunctional keyboard on Dell Latitude E5550, E5570, E5580, E5590, or E5591 laptops, or on Dell Precision 15 models, restoring full typing capability with backlit keys and the center trackpoint. - Scenario 2: Upgrading an older keyboard to a backlit option for working in low light environments such as planes, cars, or late-night office settings, while keeping English US-INTL layout. - Scenario 3: Deploying across a mixed Dell Latitude and Precision laptop fleet, allowing technicians to stock a single compatible keyboard for multiple models, with potential ribbon cable re-folding during installation.