This product is a PCI Express card used to provide a digital signal I/O function on a PC. This product features TTL level input 16ch, TTL level output 16ch opto-coupler isolated type with an internal 5VDC power supply that does not require external power. You can use all of the input signals as interrupt inputs. In addition, digital filter function to prevent wrong recognition of input signals is provided. Windows/Linux driver is bundled with this product. Possible to be used as a data recording device for LabVIEW, with dedicated libraries.