... the panel2) LCD Display: 192*64 pixels (3.7"), up to 500,000 hours life3) 26 function keys can ... screen LCDXMP3-18T-C10DI/8DO, transistor output, 3.7 inch blue touch screen LCDXMP3-18RT-C10DI/8DO, 4 ... channels transistor/4 channels relay output, 3.7 inch blue touch screen LCD, support 2 axes pulse ... RS485 communicationXP3-16R-E8DI/8DO, 8 relay output, 3.7 inch blue LCD; support RS485, 2CH pulse output, ...