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P3 P4400 Kill A Watt Electricity Usage Monitor

by P3
2,688 customer reviews
| 95 answered questions

List Price: $39.95
Price: $17.57 ($17.57 / unit) & FREE Shipping on orders over $35. Details
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  • Enter your model number above to make sure this fits.
  • Large Lcd Counts Consumption By The Kilowatt Hour
  • Connects To Household Appliance & Assesses Its Efficiency
  • Calculates Electrical Expenses By The Day, Week, Month Or Year
  • Checks The Quality Of Power By Monitoring Voltage, Line Frequency & Power Factor
  • Dim: 5.13"h X 2.38"w X 1.63"d
  • Electricity usage monitor connects to appliances and assesses efficiency
  • Large LCD display counts consumption by the kilowatt-hour
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221 new from $15.99 1 used from $29.95

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Frequently Bought Together

  • P3 P4400 Kill A Watt Electricity Usage Monitor
  • +
  • Black & Decker TLD100 Thermal Leak Detector
  • +
  • AcuRite 00613A1 Indoor Humidity Monitor
Total price: $63.37
Buy the selected items together

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CHOKING HAZARD -- Small parts. Not for children under 3 yrs.

Technical Details

Item Package Quantity: 1
  • Portable

Product Description

Item Package Quantity: 1

Empowers You to Save Hundreds on Electric Bills

Electricity bills are rising. Now you can cut down on costs and find out what appliances are actually worth keeping plugged in. Simply connect these appliances to the Kill A Watt, and it will assess how efficient they really are. The large LCD display counts consumption by the kilowatt-hour, the same as your local utility. You can calculate your electrical expenses by the day, week, month, even an entire year. Also check the quality of your power by monitoring voltage, line frequency, and power factor. Now you will know if it is time for a new refrigerator or if that old air conditioner is still saving you money. Kill A Watt can help you reduce your power bill and will help find power-wasting appliances so you are able to decide whether it is worth keeping them plugged in. For standard 115 VAC appliances only, 15 amps maximum, 125 VAC maximum.

Find Out How Much Electricity You're Using

Large LCD display counts consumption by the kilowatt-hour
The U.S Department of Energy reports that 20% of our electric bills come from items that are left plugged in when they are not in use, or items that are in standby mode. With the Kill A Watt P4400 we can monitor the energy eaters in our homes and cut down our electric bills at the same time. Plug whatever item you want into the device and it will tell you the efficiency of that item by displaying the kilowatt per hour. This device will help you determine which items are costing you the most to run. The Kill A Watt also calculates voltage, line frequency, current, and power factor. You can calculate your electric bill before you even receive it from the electric company.

Test The Quality of Your Home's Power

But measuring appliance consumption is just the tip of the iceberg. Because it can monitor voltage (Volt) and line frequency it can also test if an outlet is working, or evaluate the quality of the electrical power provided by your utility company. It can detect voltage drops around the house, help to predict brownout conditions or to make sure a new home's outlets are in working condition before escrow closes.

The LCD shows all meter readings: volts,
current, watts, frequency, power factor, and VA
About P3 International

Founded in 1987, P3 International is a privately owned manufacturer of solution oriented consumer products. For the last twenty years they have strived to develop products that are easy to use and ahead of their time. Thanks to their customer-centric attitude and support from their clients, they have experienced steady growth over the past decade.

They are committed to manufacturing high quality products that appeal to a variety of different people, from the environmentally conscious to the more technologically-minded consumer. With this philosophy driving them they are always looking for innovative new products which they can offer their customers.

Their unique products have garnered much attention, in particular the Kill A Watt. Reviews of P3 products have been featured in newspapers such as The New York Times and The Wall Street Journal.

Technical Specifications

  • Accuracy: +/- 0.2%
  • Input Power: 115 volts AC, 60 Hz
  • Max Current: 15 amps
  • Max Voltage: 125 volts
  • Max Power: 1875 VA
  • Dimensions: 5.1 inches long x 1.6 inches thick x 2.4 inches wide
  • Approvals: ETL (c), ETL (us)
  • Origin: China
  • Manufacturer Warranty: 6 months

  • Product Information

    Item Package Quantity: 1
    Technical Details
    Part Number P4400
    Item Weight6.4 ounces
    Product Dimensions8.5 x 6.5 x 3 inches
    Item model numberP4400
    Power Sourceair-powered
    Voltage115 volts
    Amperage Capacity 15 A
    Item Package Quantity1
    Number Of Pieces1
    Maximum Weight Capacity8 Ounces
    Special FeaturesPortable
    Batteries Included?No
    Batteries Required?No
    Warranty DescriptionComes with Manufacturer Warranty.
    Technical Specification
    Additional Information
    Best Sellers Rank #228 in Home Improvement (See top 100)
    Shipping Weight4 ounces (View shipping rates and policies)
    Domestic Shipping Currently, item can be shipped only within the U.S. and to APO/FPO addresses. For APO/FPO shipments, please check with the manufacturer regarding warranty and support issues.
    International Shipping This item is not eligible for international shipping. Learn More
    Date First AvailableOctober 2, 2001
    Warranty & Support

    Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.
    Warranty, Parts: Parts

    Customer Reviews

    Most Helpful Customer Reviews

    1,663 of 1,700 people found the following review helpful By Phillip Roncoroni VINE VOICE on July 8, 2005
    Item Package Quantity: 1 Verified Purchase
    I absolutely love this thing.

    Having recently moved out on my own, and generally just enjoying statistics in general, I bought this to monitor my electric costs after two high electric bills in a row. The various results I found were quite surprising.

    My air purifier, which I bought here on Amazon, uses 85 watts all the time... 85 * 24 hrs * 30 days / 1000 watts = 61.2kWhr * $0.20 = $12.24 a month.

    Well, that's quite a costly monthly addition I never thought of. And that's just the begining.

    My Vornado fan uses 45w... my air conditioner, on high 6 (out of 12) spikes up to 1200 watts. Jeez.

    My computer, at idle with external drives, uses about 250w. When doing extremely intensive things, like encoding a video, 310w.

    My light behind my computer desk, with five, 10-watt bulbs, doesn't actually use 50-watts total. No, it uses 50-watts for the bulbs, PLUS 30-watts apparently just for the light unit to function.

    You too will find out all these things you never knew, and possibly save money by cutting out, or replacing energy guzzlers.

    The product is also made in China. Just like everything else now.
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    603 of 619 people found the following review helpful By R. Nizlek on August 20, 2004
    Item Package Quantity: 1 Verified Purchase
    I absolutely love this product, it's one of the best devices I've aquired in a long time. When I purchased it a few years ago, I paid close to $50, but it was worth every penny. Some of my joy from using the device simply comes from the fact that I'm curious how much energy the products in my home use (I now know, for instance, that my cable box uses 15W of energy whether it is on or off, at that it wastes a little more than 10 kilowatt hours each month, or that my fridge uses 350W when on, or that my laptop only uses 40W - a useful fact to know when I went to buy an inverter to use it in my car), but it can also be used to save energy (I found that hitting the switch on the surge supressors of my computers at night can save me almost $5 a month off my electric bill). Additionally, it's interesting to find out where all the power you use goes, and even what members of the family use the most electricity (you could do a side by side comparason of a child's computer with yours).

    Even though I've had my Kill-A-Watt for years, I still take it out regularly to test any new equipment in my home. I know my cell phone charger uses 4 W, my regular battery charger 5 W, and my IC3 15 minute battery charger 73 W.

    Surely most will not have as much fun with this unit as I do, but it can be both practical and enjoyable for people such as myself or those looking to save some money off their electric bill. It's also an asset for anyone off-grid, who is generating their power with solar energy or by other renewable means.
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    1,010 of 1,051 people found the following review helpful By Richard Braun on November 2, 2005
    Item Package Quantity: 1
    Two years ago, my electricity consumption jumped about 40% and I ignored the problem until this fall's rate increases. I wanted to find out what I bought back in 2003 that's still eating power today. Enter the P4400 Kill-A-Watt unit, which is the only low-cost product of its type on the market today. I tried but failed to find its specifications online. So I bought a couple of these things to try them out. Here are the details on what it can do.

    * How big is the display: 4 digits.

    * What are the front-panel button capabilities: volts, amps, watts, volt-amps, power-factor, frequency (hz), KWH, timer (since reset).

    * Does it lose its data in a power failure: yes.

    * You have to plug the unit into a nonswitched wall outlet, it can't measure overhead lighting or large appliances.

    * It will report the amount of time (hours:min up to 99:59, then hours for about a year) since last reset but won't tell you how much of that time the attached device was powered on.

    How did I figure out usage? I created an Excel spreadsheet with the following columns: Device, estimated wattage, estimated hours/month, kilowatts avg/month, measured kwh/day, measured kilowatts, annual cost. I went through the house and inventoried everything I could find, entering it into a row of the spreadsheet. Then I filled in the estimates:

    - Hours/month: if I use a TV 3 hours a day, I enter the formula 3*365/12; if I use a treadmill 45 minutes on 10 days a month, the formula is 0.45*10*365/12.

    - Kilowatts (average over the month): formula is watts*hours/(24*365/12)/1000. If you have a 60-watt light left on 24/7, you should see the value 0.060; if you have it on a 12-hour timer, you should see the value 0.030.
    Read more ›
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    177 of 185 people found the following review helpful By The Crazy Autist on February 11, 2006
    Item Package Quantity: 1 Verified Purchase
    If you are a "Miser," this device will be your best friend. I bought the "Kill-A-Watt" because I suspected that our old Fridge was shooting up the electric bill. I plugged the Fridge into the meter and left it for 3 days. I was very surprised to find out the the fridge was only burning about 1.5 KWH (Kilowatt Hours) per day, which is about what it should.

    Now I am going around the house and plugging other appliances in for a couple days. The real shocker was that my "economical" eMachines PC along with a CRT monitor was using more energy than the fridge! The computer was burning almost 2 KWH per day. I made changes to the energy saver software in Windows, so that the monitor automatically shuts off in 10 minutes and the computer hibernates in 1 hour. This has brought the daily consumption down to 1 KWH.

    For those of you who don't understand KWH, its a measurement of electric usage by the power company. To be simple, using a KWH is about .08¢ in our area. So, if you save 1 KWH per day, you save .08¢ After a month's time, it's about $2.48. After a year it's about $30 bucks. The savings add up over time.

    With the Kill-A-Watt, I've found out lots of interesting things:

    My Mac Mini with a LCD monitor uses about 1/2 the power of my eMachines Tower with CRT. That's 70 Watts vs. 140 Watts.

    My Electric Blanket which I though was "economical" pulls 120 Watts during operation. It actually uses 1 KWH per day. I even found out that the blanket burns 10 Watts when the power switch is off!

    I found many "power bandits" in my home. These are devices like cellphones, scanners, routers, modems that have those little black power blocks. Most of these devices use 5 to 10 watts with the power switch off.
    Read more ›
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