P3 International P4400 Kill A Watt Electricity Usage Monitor

This little guy is awesome for rating power consumption! I plugged a small power strip into it, and connected a computer with dual flat-panel monitors, and rated overall power consumption over a day! Using this utility, you can really see how much power your items are taking up, and how much money they are costing you per hour! (Also, a cool thing to check is how much power things use while off! You would be amazed!)

The interface is simple, and easy to use! Everyone should keep one in their house, and use it!

Purchased this to get an idea of device loads.. and particularly vampire loads. It helped me identify which were the worst offenders, and with some devices, interestingly, there was zero draw when off. This was the case with my 7+ yo TV. It's definitely a handy gadget.

The one issue I have with it is the footprint. It's sized just big enough that it covers at least one open plug when you plug the unit in. If they fixed that it'd be a 5-star.

I bought this to determine Kw usage around the home and it really does work. I also used it to teach my 7 year old about current, voltage, and watts.
Well worth the money.

I don't know how I didn't have one of these before now. It works great, the display is clear (but you may need a light to read it under a desk, or behind furniture). I've used it to see how much power my PC was using to choose an appropriate power supply, and how much money I'm spending running that old refrigerator. (By the way, my mid/high-end PC only uses about 300W so no need to waste money on a crazy 600W+ supply, and a new energy efficient fridge would pay for itself in a few years).

Well worth the money spent on it. I highly recommend it to others.

After about five uses, it started registering my household voltage as 175V and 24A on a 120V 10A refrigerator. The manufacturer said it was a calibration problem and that they would not fix the device or refund my money. They said to go after Amazon.com. What a piece of garbage with horrid support.