Prolite t1531sr is based on the latest 5 wire resistive technology priceperformance ratio is ideal for the budget conscious user while quality and specification is certainly not compromised the display inputs include both analog and digital dvi with touchscreen connectivity via either usb or rs 232 which offers greater than typical flexibility a solid and steady base supports the touchscreen with an adjustable stand offering full 90 degree angles extensive touch utilities allow for 4 poin