1. 3.7" LCD monitor, 192*64 pixels, 64KB FlashROM, 1KB SRAM, 7 function keys, Support RS232/422, RTC etc 2. XINJE Electric ... 65F Model Function OP3203.7 inch monochrome LCD, 192*64 pixels, 7 function keys, RS232/RS422OP320-A3.7 inch monochrome LCD, 192*64 pixels, ... , RS232/RS422OP320-S3.7 inch monochrome LCD, 192*64 pixels, 7 function keys, RS232/RS485OP320-A-S3.7 inch monochrome LCD, 192*64 pixels ...