... monochrome LCD, 192*64 pixels, 7 function keys, RS232/RS485OP320-A-S3.7 inch monochrome LCD, 192*64 pixels, 20 function ... , 26 keys, use TP software to programMP325-AOP320-A plus touch functionMP325-A-SOP320-A-S plus touch functionOP560-T5.7 inch, 256 ... keys, 320*240 pixels, 4MB FlashROM, 2KB SRAM operate panel OP320 xinje