PRODUCT HIGHLIGHTS5.5\\\' mono display (120mm x 60mm)256x128 resolutionKeypad on touch screen versionsKeypad: 10 function keysMemory: 240K flash, 170K ram110/240V AC and 24V DC versionsOn-board communicationsThe following models also feature a built-in RS-232 printer port: A8, A10, A15, A16, A20