National Instruments PCIe-6251 multifunction data acquisition card for PCIe bus. Tested, fully functional, and in excellent physical condition. AI Channels 16 SE / 8 DI Sample Rate 1.25 MS/s single channel, 1 MS/s aggregate Resolution 16 bits, 7 gain levels AO Channels 2, 16 bits, 2.8 MS/s DIO Channels 24, 8 clocked Counters/Timers 2, 32 bits, 80 MHz For additional information and resources, use the model name to search the manufacturer's website.