Fangrui Product Details Display Size:7inch Tft. Display Area:154.08(w)x85.92(h) Resolution:800x480 . Display Color:16.77m Visual Angle:70/70/60/70(l/r/) Program Download:usb Slave(micro-usb)/u Disk/ethernet Usb Slave(micro-usb)/u Disk Communication Com0:rs232/rs485/rs422.com2:rs232. Product Name:human Machine Interface Display Contrast:500:1 Backlight:led Luminance:450cd/m Lcd Life:more Than 30000 Hours Touch Panel 4-wire Precision Resistance Network ( Hardness 4h) Cpu:arm Risc 32bit 800mhz Memory 256mb Flash Memory+128mb Memory :built-in External Storage:1usb Host Printer Port:usb Host/serial Port Ethernet:10/100m Adaptable Ethernet Interface:none Bus Interface:none Electrical Specification: Input Range:dc12v-dc28v,inbuilt Isolated Power Supply Power:3.6w@dc24v Allowable Loss Of Power:less Than 3ms Insulation Resistance: 50mohm@ 500v Dc Hi-pot Test:500v Ac 1 Minute Note: There Are No Programs In The Touch Screen. Please Make Sure You Have A Program Or Know How To Program Before Purchasing. If There Is No Program, You Canno