P3 P4400 Kill A Watt Electricity Usage Monitor

Installation: literally plug-n-play. Very straightforward with no surprises . Versatility: Works well across different setups and applications, giving you flexibility in how you use it. Value for money: Priced fairly for the performance and build quality you get. Safety: Feels secure in use with no concerning heat, wiring, or stability issues. Power: Delivers consistent power without drops or fluctuations during operation. Size: Compact enough to fit in tight spaces while still being easy to handle.

Accurate, Simple, and Addictively Useful The P3 Kill A Watt Electricity Usage Monitor is one of those inexpensive gadgets that quietly changes how you think about energy use. I first bought it to see how much power my old refrigerator was pulling—and ended up testing every appliance in the house. Setup is instant: plug it into the wall, connect any device, and the bright LCD display immediately shows volts, amps, and watts in real time. Leave it running for hours or days, and it totals up the kilowatt-hours (kWh), letting you see exactly what that appliance costs you per day or month. What makes it so helpful is how accurate and intuitive it is. You don’t need to be an engineer—just read the wattage and multiply by your utility rate. I found a few “phantom” power hogs drawing 10–20 watts even when off (like a cable box and an older UPS). It’s also great for testing PC builds, aquarium setups, or any electronics to ensure your power supply is sufficient. The build quality is solid, and the display remains easy to read even after years of use. The only caution: it’s designed for 115V North American outlets only—not for international use. Bottom line: A must-have tool for anyone curious about energy use or looking to cut electric bills. Simple, accurate, and surprisingly enlightening—it pays for itself quickly.

Does what its supposed to do. Just basic numbers, does not go into detail.

If we can accept the accuracy of the information that it provides, it is an extraordinary tool for locating devices stealing power. As an example, I run five uninterruptible power supply (UPS) devices that I had never bothered to investigate in terms of their charging algorithms. That is to say, I had never bothered to turn them off when the equipment attached to them was not running and it turned out they were costing more to run in a month than a refrigerator does in a year. There are a couple of issues. 1.) No back light. 2.) Device resets when disconnected from power source. Some of the items I want to test I can barely reach to plug the device in, let alone read. Reset should be user selectable.

Ever wonder how many watts an appliance is using? I have. That's why I bought this; I was wondering if my "tea machine" Tiger PDN-A50U Electric Water Dispenser, 5.0-Liter was an energy hog or a conservation appliance. Thanks to this, I now know it's an energy SAVER. This could not be easier to use. Simply plug the meter into any wall socket. Leave it there as long as you like and use this meter like an electrical outlet. When you want to measure an appliance's electricity use, you simply press the "Watt" button & the LCD display will show you the real-time wattage usage. For example, with my "tea machine," when it boils water, it uses about 900 watts. Once it stops boiling, it uses just .3 watts, on average, to keep warm. When dispensing, it uses 62 watts (to power an electric pump), then immediately reverts back to its .3 watt "keep warm" usage. This can also be used as a voltmeter (measuring the electricity flow INTO the outlet). For American household power, this is roughly around 120 volts (except in "brown out" conditions). Useful to check during brownout conditions, simply because using some appliances during low voltage conditions can potentially damage them (this, fortunately, rarely happens in the US, but some Californians have occasionally experienced this). There's also a purple KwH button. This will let you measure the KwH usage of an appliance over a period of time. If you have an appliance (say, like a stereo subwoofer) that you suspect might be a Vampire Power Energy Hog (one that uses a lot of power, even when turned off), you can easily confirm this suspicion by plugging it into this meter, pressing the KwH button, & then check in 24 hours and see how many KwH your appliance has consumed. If your subwoofer's an energy hog, just unplug it when you're not using it & you'll lower your electrical bills. I LOVE this device, because it's helped me logically evaluate actual energy usage, instead of just going by my "gut" feeling. Knowledge is Power! This is easy to use & well worth every penny of its cost. In just a month, it more than pays for itself, if you've not been paying sufficient attention to your energy use. Now, instead of guessing how much power you're actually using to operate an appliance, now you can know. Great for everything from rice cookers, tea machines, toaster ovens, computers, printers, stereo equipment, battery chargers & more. A+!

Love this little device. I should have bought this YEARS AGO!!! I got it via Amazon Prime in less than 36 hours. Okay, I must be getting seriously frugal in my old age! ;>) I am trying to convert my gas heated house to be as electrically energy efficient as possible to run off a small 2000 watt generator when we have another extended power outages from an ICE storm. I am amazed some of the 'little' things that consume 2 to 5 watts of power just being plugged in and not even being used; with limited wattage available via a generator every watt counts. EG: Have an old TV and DVD player in a guest bedroom that has not been used in years consumes 8 watts of power. (Translates into $6.73 per year ((8*24*365*)/1000)*$0.096perKwh) They are NOW unplugged. Converting my family room 60 watt light bulbs to VOLT brand LED FOREVER bulbs (7 watt-60watt equivalent lumens) at a cost of $9 a bulb will save me $21 per year per bulb if bulb is used 6 hours a day. WOW! LED bulbs can save a TON of money over incandescent without the risk of mercury in fluorescents bulbs and LED will last forever unlike fluorescent that claim long life and die just as fast as normal bulbs! I have a bathroom that has six lights which consumed 60 watts each; changing these bulbs out at a cost of $54 for all six bulbs will save me $2 per month (usage of 2 hours a day). Pay off in savings for bulb costs in less than 27 months and the bulbs should last three times as long as a incandescent without the extreme heat! All-in-all I like this meter. Though I wish I had purchased the model with a built-in battery back up. Next one I purchase will. You HAVE to use this with an 6 ft appliance extension cord if you plan on using this. Display is next to impossible to read otherwise when plugged into an outlet 15 inches off the floor. You unplug it losses ALL it data.

This product works as expected. I purchased this unit to make an analisis about parasit power consumption in my electronic appliances in home. I discover the following: - the lcd requires 180 ~ 230 watts. After going to standby or shutdown, the tv use 60 watts for 3 minutes. This is to cool down the lcd lamp for protection (fans and additional circuit works for this time). Can be a mistake if I remove the AC cable power or enterely shutdown the tv without allow this process to finish. Good discover. After this 3 minutes, the standby mode on the monitor only requires 05. to 1w. - my motorola cable system requires the same ammount of power (27 ~ 30 watts) no matter if this unit is ON or off!!!!... all the time is fully powered (because have an internal hard drive). But I believe (wrong!) this unit must save about 50% if is off.. but no!!!! - the blackberry / sony ericson chargers do not drain any power (0W) from AC if the phone itself is not connected. I DON't need to disconect this chargers from the outlets. - My APC Smart UPS 1500 drain 30 WATTS! even when is completely turned off!!!Is better to disconnect this unit from the ac cable!!! amazing!... - My pc (dimension 9150) is a power hungry pc. Because have pentium D (first edition) who requires a lot of power. This pc requires 230 watts but when I play Command Conquer (3D real time strategy) and because I have a HD2900 ATI High Definition card who requires 650 watts PSU. Interesting: when I play the game the power rise from 230 to 300~320 watts!!!! This unit is very usefull to understand how the electronic systems works and if are energy efficient and how you must manage this units to save power and money. Highly recommended, is cheap and you can check your ac freq and exact voltage (i have 128 volts from 127 expected in the ac line)...... enjoy and sorry my english

These things are fantastic. They're very helpful to keep track of the amps we are pulling when we have larger shows. It shows you the Watts and Amps. It has some other great features that we don't use but it's nice that it's there. I highly recommend this device when you want to make sure you stay within the amperage limits of an outlet especially.

To start , I lent someone my 12000 watt generator . They said it was too hard on gas so they turned the idle down .. a lot . When I got it back , I turned it up to were I thought it was before .. but not so . with in 3 days of out power outage .. it fried my microwave , because it was not putting out 60hz . I bought this P3 .. ran my generator and plugged it in a wall plug in my house . the meter said 42hz . So I was was able to adjust it to run at 60hz .. in my house . Great meter , it does a whole lot more that what I wanted it for . BUY ONE !!!

If you live in the UK, do NOT buy this product. It is not designed for the UK and you will have to return it. The company, so far, has refused to pay the return postage, even though this is entirely their mistake. I have no idea why it is not clearly labelled.

Fantástica compra, cumplió todas mis expectativas y al tener un soporte de hasta 1.8kw me permite medir dispositivos de alto consumo. Quien iba a decir que mi PC (solo el gabinete) consume 4 veces mas que mi refri de 7 pies. Gracias a esta maravilla, ahora lo sé. Recomendadísimo, entrega en excelentes condiciones y vino empaquetado con su bolsa antigolpes.

1. Operating voltage is incompatible with Japan's 100VAC. 2. Seller support is poor and maker (P3) doesn't respond to emailed questions. A waste of money.

Bought this on Amazon UK and it does not state that it is not suitable for UK use - plugs are US(?). Will now have to pay a lot to return it to a US address. Not impressed.