Detailed features: INSTRUNET i555 STARTER SYSTEM Usb 2.0 High Speed Data Acquisition Hardware for Windows ? Xp Sp2, Vista or 7 (Xp/Vs/7/8)InstruNet Software2x Precision Voltage Outputs (±10V, 14bit D/A)2x Voltage Outputs (0.. 10V, 8bit D/A)4x Universal Digital I/O (20mA sink, -10V..30V)Connect Directly To Sensors: Voltage, Thermocouple, Thermistor, RTD, Load Cell, Strain Gage, Potentiometer, Current, ResistanceEasily expand via 2 free slots in 4 slot i4xx Card CageThe i555 includes the following products: i240, i430, i510, i400, i410, i312.