Measures volts, amps, watts, elapsed time, and cumulative kilowatt hours for 120 volt devices plugged into it. Great for measuring electrical energy consumption of appliances, ebike chargers and other devices that plug into a standard 120 volt outlet.
The meter I prefer for simple operation is the P4400 Kill A Watt by P3 International (pictured) although I also have Micro Power Monitor by Poniie