An integrated analysis tool, the Payback Calculator, automatically calculates the time required for a new energy efficient appliance to pay for itself. Monthly savings are highlighted, and compared to the purchase price of the new appliance.
The PRO version includes all the displays of Watts up?, and in addition the PRO records all the data into non-volatile (stored even if power is lost) memory. One thousand data points are stored, starting with a sampling rate resolution of one second. The sample rate resolution increases over time (sample rate equals total time divided by 1000) so years of usage can be accurately recorded. The included serial cable and software program allows the data to be quickly downloaded to a PC where the included software creates a data table and easily manipulated graphs. The data can also be exported in a comma-delimited format to popular spreadsheet programs for further analysis.
120 VAC, 60 Hz, 15 amps continuous True RMS power measured and displayed Indoor use only RS232 interface, A USB to RS232 adapter is available.
Watts Up? PRO 
An integrated analysis tool, the Payback Calculator, automatically calculates the time required for a new energy efficient appliance to pay for itself. Monthly savings are highlighted, and compared to the purchase price of the new appliance.