This product is a PCI Express bus-compliant interface card for input/output of unisolated TTL-level digital signals. This product can input and output up to 16 channels. You can use all of the input signals as interrupt inputs. This product supports a Low Profile size slot and, if replaced with the supplied bracket, supports a standard size slot, too. Using the bundled API function library package [API-PAC(W32)], you can create Windows application software for this card in your favorite programming language supporting Win32 API functions, such as Visual Basic or Visual C++.