--- product_id: 10643205 title: "P3 P4455 Power Monitoring for Dummies" brand: "p3" price: "฿162" currency: THB in_stock: false reviews_count: 7 url: https://www.desertcart.co.th/products/10643205-p3-p4455-power-monitoring-for-dummies store_origin: TH region: Thailand --- # 125 Vac max voltage Tracks cost by week, month & year 15 A max current P3 P4455 Power Monitoring for Dummies **Brand:** p3 **Price:** ฿162 **Availability:** ❌ Out of Stock ## Summary > ⚡ Know your watts, save your wallet! ## Quick Answers - **What is this?** P3 P4455 Power Monitoring for Dummies by p3 - **How much does it cost?** ฿162 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/10643205-p3-p4455-power-monitoring-for-dummies) ## Best For - p3 enthusiasts ## Why This Product - Trusted p3 brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Save Big on Bills:** Identify energy hogs and cut costs—because every watt counts. - • **Compact & Portable:** Lightweight 13.3 oz design fits anywhere, perfect for home or office use. - • **Voltage Quality Check:** Monitor voltage to protect your valuable electronics from power surges. - • **Instant Energy Insights:** Plug in and instantly see which appliances drain your wallet. - • **Comprehensive Cost Tracking:** Calculate your electric expenses daily, weekly, monthly, or yearly for smarter budgeting. ## Overview The P3 P4455 Power Monitoring for Dummies is a compact, easy-to-use device that measures voltage up to 125 Vac and current up to 15 A, providing real-time energy consumption data. It calculates electricity costs by day, week, month, and year, helping users identify costly appliances and optimize energy use to save money and protect electronics. ## Description Now anyone can cut their electric costs by finding out which appliances are worth keeping. Simply plug the Power Monitor into an outlet, connect an appliance, and it will tell you how much it’s costing you. Get the facts you need to decide if it’s finally time to get that shiny new refrigerator or learn the shocking truth of just how much of an energy hog that old air conditioner is. You can calculate your electrical expenses and forecast usage by the day, week, month, or even an entire year. Also check the quality of your power by monitoring the voltage to make sure you’re not putting valuable electronics at risk. With Power Monitoring For Dummies, you can now know “watts” killing you. ## Features - Max Voltage: 125 Vac - Max Current: 15a - Max Power: 1875 Va - Save Hundreds On Electric Bill - Calculates Cost By Week, Month & Year ## Technical Specifications | Specification | Value | |---------------|-------| | Manufacturer | P3 | | Part Number | P4455 | | Item Weight | 13.3 ounces | | Product Dimensions | 8.5 x 6 x 2.7 inches | | Item model number | P4455 | | Is Discontinued By Manufacturer | No | | Color | P3 P4455 Power Monitoring for Dummies | | Material | copper | | Voltage | 125 Volts | | Item Package Quantity | 1 | | Usage | personal | | Batteries Included? | No | | Batteries Required? | No | ## Images ![P3 P4455 Power Monitoring for Dummies - Image 1](https://m.media-amazon.com/images/I/7110MQJWSSL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great Tool for Gauging Power Usage, Cheaper than the P4460 Pro Model *by R***N on Reviewed in the United States on August 21, 2015* I've always wanted a KillaWatt and after a lot research, I decided on this model. It's basically a derivative of the P4460 Pro model but with the "made for Dummies" marketing spin, and it includes the Pro's most important feature - battery backup. This means that when you unplug the KillaWatt, it retains the usage recorded (how many hours at what rate). This combined with the lower cost compared to the Pro made it a no brainer. I bought this in April '15, and since then I've realized that there's a couple points where this model actually wins over the Pro:1. the user interface is more logically organizedThe buttons are clearly labeled and you should have no problem using it without even glancing at the user's manual. There's a dedicated $ button for the cost, followed by buttons that toggle between Watt/VA, Volt/Amp and KWH/Hour. The yellow Pro button at the end allows you to see all the info plus detailed data about your CO2 emission (day/week/year/total) and cost (day/week/year/total).A couple useful pointers that may not be immediately apparent:-to clear the stored usage data, press and hold down the KWH/Hour key in standard mode.-to change the KWH cost to your local rate, go into Pro mode and press and hold the $ button until it flashes "rate". Update it to your local rate and press the Pro button to save-to change the pound of CO2 emission per KWH, go into Pro mode and press and hold the Watt/VA button until it flashes "rate". Update it to your local rate (you can get this info by contacting your local power company) and press the Pro button to save2. the user manualTrue to its nature as a "designed for dummies" product, this KillaWatt's user manual is well written and easy to follow!On the other hand, there's definitely some room left for improvements:1. Lack of backlight in the displayThe display doesn't have any backlight whatsoever. I get that it's probably good for not adding any extraneous power draw, but an option to light it for a second or two would be very useful since a lot of times, the unit would be in a tight spot behind appliances or furniture and it's almost impossible to read the screen without grabbing a flashlight.2. Front plug is extremely tightThe front plug where you plug your device in has an extremely tight fit. I have to really push and pull to plug and unplug devices. Here you definitely do NOT want to pull on the wire alone - it most likely will not unplug and you will damage your device and/or plug in the process. While I appreciate a tight fit for a solid connection, this is a bit overboard. I think a couple other reviewers reported similar experiences, so it's probably not an isolated incident. Just be extra careful when plugging and unplugging devices.The device is rated to take max voltage of 125V @ 15A, or a total of 1875 VA. Another reviewer mentioned that his KillaWatt failed after using it to monitor his electric vehicle. That's probably above the device's rated capacity, which is why it died so quickly. I think as long as you stay within the rated envelope, the device should work fine.I've certainly learned a lot about my various other gadgets and saved some power/reduced my carbon foot print in the process. For example, most of the new cell phone chargers actually don't draw any discernible power when the phone is unplugged. That was a relief as it's a lot easier to have the chargers constantly plugged in. My old microwave with a digital clock was drawing close to 3 watts just idling - I've since decided to only plug it in as needed. It's also fun to verify the performance of my new LED light bulbs - some actually perform better than their factor specs! My toshiba laptop has a nifty software monitoring tool that tells me how many watts it's drawing at any given time. And it turns out, the numbers match up with what I am seeing with the KillaWatt. Overall, I've enjoyed having this gadget and I highly recommend this model! ### ⭐⭐⭐⭐ A (very) basic power meter at an attractive price point but the user interface could be improved. *by S***N on Reviewed in the United States on October 13, 2015* I picked up the P3 P44545 to measure power usage of appliances around the house. It got the job done but not without some frustration.What I liked about the meter:* Convenient "in-line" deployment. Just plug it into the wall and plug the appliance into the unit.* Seems pretty accurate* Provides all the data I wanted (but not necessarily in the form I wanted)What I didn't like:* No backlight on the display. Really annoying considering that the unit is often installed behind an appliance somewhere. I repeatedly had to resort to using a flashlight to read the display. User hint: Use a short extension cord between the unit and the wall so you can have the unit in a more convenient location for easier reading.* Doesn't provide the key metric I wanted, that is, estimated kW.h/month. My utility bills me based on the number of kW.h used for the month. The P4455 does provide an estimate for the cost per day, week, month in $ (nice) and CO2 per day, week, month, but oddly not the kW.h per day/week/month! While it's nice that it computes the cost (based on a rate per kW.h that you program into the device), this isn't sufficient to calculate cost when your utility has variable rates depending on usage (like my utility does). So in addition to the cost and CO2 estimates, it would be great to have the "raw" kW.h estimate per day/week/month. Note that you can derive the kW.h per day/week/month by dividing the total kW.h used by the total hours (both recorded) to arrive at the average power and then scaling according to the number of hours per day/week/month respectively. Doing this is a minor annoyance that could have been avoidable if this data was available on the unit.* The "dummy" and "Pro" modes just complicate things! I feel that there should have been a single, consistent user interface, not two! The "Pro" mode doesn't add all that much information that couldn't have been incorporated in the simple mode. Nice try P3, but I don't think this idea works well. Yes, I know that there are other models that don't have two modes, but my point is that this "dual personality" on this device isn't a win in my view.Wishlist:* Data logging! Maybe it's asking a lot given the low price point, but this would be very handy to have. There are many online projects that hack the P3 meters to enable data logging. Hey P3 -- take the hint please! And no, please don't take the hint to mean 5X the price.* Bluetooth LE support. See "behind the fridge" above. Also this would make it super easy to pull the data log from the device using a phone. See also "not 5X the price" ### ⭐⭐⭐⭐⭐ Excelente Producto *by J***O on Reviewed in Mexico on May 13, 2021* Sirve perfectamente para monitorear un equipo, un refrigerador, una tele, o cualquier equipo electrónico, siempre y cuando no sobrepase la capacidad del Kill a watt (1875 va). Trae una batería interna lo mas probable, porque no pierde las mediciones. Puedes checar Voltaje, amperaje, factor de potencia, watts, si le pones la tarifa que te cobran por kw, puedes saber el costo de ese equipo al tenerlo conectado por dio, por mes, etc. Un refrigerador por ejemplo esta encendiendo y apagándose, muchas veces en todo el día, por lo que dejándolo monitoreando por un día, puedes mas o menos tener idea de cuanto consumirá por un mes o mas, que si lo dejas conectado permanentemente al Kill a watt, sabrás con exactitud cuanto cuesta tener ese refrigerador al año, y saber si ya es tiempo de cambiarlo por uno mas nuevo. RECOMENDADO AL 100%. Yo había comprado un modelo anterior del Kill a Watt y ya tengo mas de 8 años con el y sigue funcionando, por lo que creo que este, debe de tener también buena duración --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.th/products/10643205-p3-p4455-power-monitoring-for-dummies](https://www.desertcart.co.th/products/10643205-p3-p4455-power-monitoring-for-dummies) --- *Product available on Desertcart Thailand* *Store origin: TH* *Last updated: 2026-04-26*