From the manual which is available online as a PDF from the manufacturer:
The Infratek 105A Digital Wattmeter is a high performance 5 digit instrument for general-purpose applications. Features of the basic 105A include:
- Power Measurement
- True RMS voltage measurement
- True RMS current measurement up to 25A
- Highly legible vacuum fluorescent display
- Easy front panel operation
- Sequential display of all measured quantities
- Non-volatile memory for scaling factors
This unit has an installed IEEE-488 Interface featuring:
- Complete programmability
- Adapts to other installed options
- Simple command set
- Galvanically isolated
It also has an Energy Converter featuring:
- Background energy computation
- Power factor computation