... 7 function keys, Support RS232/422, RTC etc 2. XINJE Electric OP320General Specifications:1) Screen Pixel: 192 × 642) ... *64 pixels, 20 function keys, RS232/RS485MP330-SOperate panel with touch function, 3.7 inch monochrome, 192*64 ... , 26 keys, use OP software to programMP360-LOperate panel with touch function, 3.7 inch monochrome, 192* ... , 320*240 pixels, 4MB FlashROM, 2KB SRAM operate panel OP320 xinje