Models MT310, MT320, and MT330 MultiMeters measure ac/dc voltage, ac/dc current, resistance, frequency, duty cycle, and capacitance. The basic dc-volts accuracy of Model MT310 is 0.5%. Model MT320 features a basic dc-volts accuracy of 0.3% and a temperature function with switchable °F/°C units. Model MT330 includes a basic dc-volts accuracy of 0.1%, temperature function with switchable °F/°C units, and true RMS measurements for ac voltage and current. Measurements are displayed on an oversize, high contrast, 4,000 count LCD. Display prompts indicate correct test probe connections, blown fuses, and to disconnect power for passive functions. The optically isolated RS-232 PC interface with optional RS-232 cable and Windows 95/98 compatible software allows the user to collect, display, plot, and save data. Added functions include diode and continuity tests, data-hold and relative functions, and auto power off.The DMM is UL listed and meets CAT II-1000 Vdc, 700 Vac. Complete with built-in stand, test leads, temperature probe, protective holster, and 9V battery. Dimensions: 3.5" x 7" x 1.3". Starting price is $79.00.