Open Frame 21.5 Inch Touch Screen Monitor All in One POS PC POS System. Intel Celeron J1800 CPU: Powered by Intel Celeron J1800 with optional i3/i5/i7 processors for flexible performance. Industrial Grade Display: 21.5-inch LED with 1920x1080 resolution, 400 cd/m2 brightness, and 89/89/89/89 viewing angles. Capacitive Touch Screen: Features a True-Flat Capacitive Touch Screen for accurate and responsive user interaction. Multiple OS Support: Compatible with Windows 7, Windows 10, and Linux operating systems for software flexibility. Durable Metal Housing: Constructed with a metal alloy housing for robustness and stability in commercial environments. Broad Application Scope: Ideal for supermarkets, retail stores, hospitals, restaurants, and industrial settings.