P3 International P4400 Kill A Watt Electricity Usage Monitor

Works very well and provided all necessary information for analysis of power quality and quantity. Highly recommend.

There is a CD player in our basement that my wife uses sometimes. This told me that even when it is "off" it uses 20watts. A power strip solves the problem, but unit allowed me to conduct an inventory of my house looking to deploy these. Use it with a three/two prong adaptor and a short extension cord, so you can test hard to see plugs and insert it in two prong extension cords.

Unlike the ammeter which clamps around a cord, you have to turn things off and unplug things to test them. Also this does not measure smaller than 1 watt, so you wont get much results trying to test those power bricks when the are not doing anything, but you can verify that there are not surprises.

Very pleased. Works exactly as I expected/desired. The negatives I read about prior to using the product seem very overdone. Do yourself a favor, like I did, and attach a 10" pigtail to the device (available at most retailers). With this addon, you won't have any problem plugging the device into any standard outlet, even if the other plug in the outlet is being used. My pigtail lights up, so it also confirms a good connection. Easier to manipulate the device and read the display. Very easy to read display, disregard commenters that state otherwise. In the dark, use a flashlight to read the digits, if necessary. I gathered some very interesting data, such as a string of lights I have up around my patio that I've always been curious what they're consuming, given that the box they came in gave no indication of the strand total or the individual bulbs. Turns out the 100+ lights use 38 watts under full load. Pleasantly surprised on that one. My girlfriend's cell phone charger uses 0 watts when it's not charging, even though a tiny LED shines, indicating it's plugged in. I've had a lot of fun with the device and I'm sure it will prove to be very useful in the coming months/years.

Good little unit, the only draw back is you have to get down on your hands and knees to read it. It would be nice if it could retain data for a few a little while so you could take it out to read it.

Everyone needs this monitor. When complaining about the cost of power bills you might be shocked to find out how much your are paying just for technology you have plugged in around your house and not being used. As Vice Chair of the Efficiency and Conservation Sub Committee for the State of Alabama we are looking at implementing a technology call "GreenSwitch". GreenSwitch will turn off all lights, turn up or down theromstats, and turn off all electrical outlets when you are not home or "retired for the night". We were absolutely shocked at how much "vampire power" is being "sucked" out of hour homes. The DOE says this is 10%-15% of our powerbills. We highly recommend all states adopt this technology. It is simple and it works. Everyone knows how to turn a switch on or off. That is all you have to do with this technology (GreenSwitch).

Stan J. Trott
Permanent Joint Legislative Committee on Energy
State of Alabama