Digital Multimeter, Data Acquisition, Switching, Datalogging System with 5-slots, 6 1/2 Digits. Unit sold with a valid calibration certificate. Combines functions of DMM, switch system, and datalogger True 6½-digit (22-bit) resolution Choice of 12 switch/control plug-in modules Up to 200 differential input channels (with 300V isolation) for measurement and control Convenient front panel inputs LabVIEW, LabWindows/CVI, Visual Basic, C/C++, and TestPoint drivers (IVI style) GPIB and RS-232 communications capabilities ExceLINX-1A datalogging software