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Sunny Health & Fitness Smart Wi-Fi Treadmills

  • Based on 9,223 reviews
Condition: New
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Availability: 17 left in stock
Fulfilled by Amazon

Arrives Thursday, Nov 13
Order within 22 hours and 32 minutes
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Style: Classic


Features

  • POWERFUL DRIVE SYSTEMExperience reliable performance with a robust 2.20 peak HP drive system, providing speeds ranging from 0.5 to 9 MPH, catering to various fitness levels.
  • ADJUSTABLE INCLINE LEVELSCustomize your workout with 3 manual incline options (0%, 2%, 4.37%) to meet your comfort and intensity preferences, enhancing your overall exercise experience.
  • EMERGENCY STOP BRAKEEnsure safety during workouts with an emergency stop brake feature.
  • DURABLE & STABLE CONSTRUCTIONBuilt to accommodate different users, this treadmill is designed for various users, providing stability and durability for your fitness routine.
  • SPACIOUS RUNNING SURFACEEnjoy a generous running area with dimensions of 49 L x 15.5W inches, offering ample space for comfortable walking or jogging
  • CONVENIENT STORAGE & MOBILITYConveniently fold and unfold your treadmill with an easy folding mechanism and soft drop system. Effortlessly transport your treadmill within your home to accommodate your preferred workout space.
  • HANDRAIL CONTROLSTake control of your workout with handrail controls that allow you to adjust speed, start and stop the treadmill. The pause function lets you stop the belt while preserving your running data.
  • DIVERSE WORKOUT PROGRAMSChoose from 9 built-in workout programs designed to add variety and challenge to your fitness routine. The large LCD displays provide real-time information on time, distance, speed, calories burned, and pulse.
  • SMARTPHONE/TABLET HOLDERStay connected and entertained during workouts with the convenient smartphone/tablet holder included, accommodating a variety of devices for a personalized and engaging exercise experience.
  • Sunny Health & Fitness CommitmentA top fitness brand for 20+ years, offers superior products and a dedication to excellence. Count on our committed customer service and enjoy peace of mind with a 3-year warranty on the structural frame.

Specs & Other Info

SpecificationDetails
ManufacturerSunny Health & Fitness
Material CompositionAlloy Steel
Product ColorGray
Item Dimensions25.5"D x 60"W x 50"H
Weight of Item103 Pounds
Max Velocity9 Miles per Hour
Unique FeatureIncludes Monitor
Recommended SettingsIndoor Residential
AudienceAdults
Maximum Output2.2 Horsepower
Incline Capability4.3%
Setup RequiredYes
Display TechnologyLCD
Energy SourceCorded Electric
Number of Workout Programs9
Components IncludedTreadmill, User Manual
Maximum User Weight220 Pounds
Running Surface Dimensions49"L x 15.5"W
Frame MaterialAlloy Steel
Top Speed9 MPH
Compact Dimensions When Folded36"L x 25.5"W x 58"H
Monitor Diagonal Measurement20 Inches
Power Requirement220 Watts
Minimum Speed Option0.5 Miles per Hour
Warranty Policy3 year structural frame / 180 days other parts and components
Product ModelSF-T4400
Intended UseUnisex-Adult
Launch DateOctober 22, 2014

Frequently asked questions

To fold the treadmill, ensure the machine is turned off and unplugged. Locate the knob or lever at the base or lower section of the treadmill. Release it, then carefully lift the deck until it locks into a vertical position. To unfold, gently press the release mechanism and lower the deck to the ground firmly and slowly to avoid any sudden impact.

Yes, you can track your workout progress using the exclusive SunnyFit App. Start by downloading the SunnyFit App on your smartphone or tablet from the app store, then connect it to your treadmill via Bluetooth, if your model includes this option. This app allows you to monitor your heart rate, speed, distance, and calories burned in real-time and stores your workout history for progress tracking.

Absolutely, this treadmill is equipped with a built-in shock absorption system that reduces impact on your joints during your workouts. This makes it suitable for longer running sessions and for individuals with joint concerns, providing a more comfortable and safer exercise experience.

The one-touch speed buttons on the treadmill allow you to instantly change your speed without the need to manually adjust through settings. This feature provides quick selection of commonly used speeds, making it easier to vary your workout intensity or return to a comfortable pace without interruption. Simply press the desired speed button while exercising.

Top Amazon Reviews

🚀 Abunda's Overview

This is our summary and key points to consider based on customer reviews.


The reviewed treadmill presents itself as a solid, budget-friendly option suitable for home gyms and personal use, with positive feedback on its easy assembly, functionality, and compact size allowing for folding and storage. Users praised its sturdiness and performance for both walking and running, highlighting its incline capabilities and sufficient track size for comfort. While there are minor criticisms regarding the heart rate monitor's accuracy and a few ergonomic oversights, the overall sentiment is highly favorable, indicating a reputable choice for those seeking an efficient and space-saving exercise solution.

Pros

  • 👍 Suitable for users of various sizes, with a track comfortable for running and walking
  • 🏋️ Assembly is straightforward, manageable even in tight spaces
  • 📐 Compact and foldable design, ideal for home use with limited space
  • 💰 Excellent value for the price, offering good quality and functionality
  • 🚀 Features incline capabilities and easy storage, enhancing workout variety

Cons

  • ❗ Heart rate monitor found to be inaccurate by some users
  • ⚙️ Manual incline adjustment rather than automatic
  • 🔊 Can be loud at higher speeds, though manageable with headphones or background music
  • 🥤 Cup holders and tablet holder are a bit small

Should I Buy It?

If you are in the market for an affordable, space-saving treadmill with good functionality for daily use, this product comes highly recommended by users. Despite minor flaws such as the heart rate monitor's accuracy and manual incline adjustment, its overall performance, ease of assembly, and sturdiness make it a worthy investment for those looking to maintain or start their fitness journey from the comfort of their home.


  • 8 Month Review: Perfect Beginner Treadmill
Style: Classic
When I decided to buy a treadmill instead of going back to the gym I agonized over all the options for weeks. I'm extremely happy I settled on this one and I feel like I owe it the review I would have liked to read when I was still shopping around. For reference, I am a 5'8" 180 pound beginning runner, and I started off using this very intermittently but have been consistently running 2 miles most days for the past 6 months. What I cared about in a treadmill was finding the intersection of the cheapest option that I could find that still felt sturdy and reliable and I think I nailed it. This thing surprised me by not feeling even a little flimsy right out of the box and after 8 months total use there is no noticeable wear, despite even occasionally being used by my 6'3" 220 pound partner, who also reports that it feels extremely solid. Here are some other things you might find useful to know: - If you typically do well with putting together Ikea furniture you will have no problem with this, it's all (included) allen wrenches, pictographs, and a couple bolts, and took maybe half an hour to assemble on my own. - I wanted something that went up to at least 10mph so I would have some room to improve, but honestly I haven't really leveled up past 6mph so I can't say for sure that this actually gets that fast. I've taken it up to 7mph max with no issues. - This is very no frills, just start, stop, faster, slower, and 2mph 4mph and 6mph preset buttons. There are theoretically several interval programs but I personally haven't used them, the preset buttons have been my friends. If you just want a thing that you can run or walk on and you don't care how many buttons it has, this is the treadmill for you. - The heart monitor is completely useless, like not even remotely accurate. I wear a fitbit so I don't care at all about that, but if the pulse reading is a selling point for you just know that this treadmill might as well not have a heart monitor. - There is the option for a very slight amount of incline, which I scoffed at initially. I basically decided to keep it at the max incline all the time since it seemed negligible, but I recently ran on a hotel treadmill and was actually shocked how different it felt to run completely level, so you know, it's not nothing. - This is in an area of my house where I can keep it down all the time, but it does fold and unfold very easily and to what seems like a reasonable size. - As a person who is fairly clueless about treadmill care I have used belt lubricant on this twice since I initially set it up (so three times total) at times when I arbitrarily felt like maybe it might be the right time for it. This may or may not be a selling point about this treadmill's durability, I will let you be the judge. - I have also slightly adjusted the belt twice because it looked like it was maybe going a little off center (purely visual diagnosis, no problems with how it was running) which was a simple two step process that required the same (included) allen wrench. - If I hadn't done the last two pieces of maintenance I suspect that it would still be running fine, since both were done just cause I felt like maybe I should, but who knows, they could have also made all the difference. Either way, personally that seems like a reasonable amount of maintenance over 8 months, but you might disagree. tl;dr If you are a beginning runner who just wants a super basic treadmill that won't break the bank, can grow with you on your running journey, and doesn't feel even a tiny bit like you are going to break any part of it, this one here is a winner. ... show more
Reviewed in the United States on November 17, 2021 by Meredith Redfern

  • Five year strong
Style: Classic
I've been using this machine consistently for 5 years and, suddenly, it stopped working. I contacted Sunny's Customer Support and, after submitting pictures, Steven was able to diagnose the problem. For less than $20.00, for two cables and on/off switch, the machine is running again once I replaced them (there was a helpful video for this online). The problem seemed to be a burned out cable connecting to the power switch. ... show more
Reviewed in the United States on September 9, 2025 by Arlene J Santos

  • Works well; may need workaround for holding Ipad
Style: Classic
Bought this a year or so ago and use it 1/2 hour every day. So far, no problems. The plastic cover at the base did crack as mentioned by others, but the function is unaffected. The only negative for me is that the holder for a thin book or Ipad is only 1/2" deep and 9" long, which means that I had to take the magnetic keypad off of my Ipad (too thick) and had to view it in the portrait orientation (landscape is too wide). Whatever you put here covers over the control panel of the treadmill, which may or may not be an issue depending on your use. Ended up buying a clear plastic Z-shaped carrier (mentioned by others) which fits in the holder of the treadmill; it is open ended and 1-1/2" deep, which allows for landscape orientation and any cover, keyboard, or anything else enveloping your Ipad. Treadmill itself works well; no problems so far, although I only use it at one speed and haven't tried any of the programmed settings yet. ... show more
Reviewed in the United States on October 20, 2025 by MBV

  • Alice's Treadmill
Style: Classic
no problems with this product since I purchased it
Reviewed in the United States on October 12, 2025 by Keisha Rice

  • A great budget-friendly treadmill! Buy it!
Style: Classic
This is a great treadmill. I read many reviews and spent a long time to decide on an under $500 treadmill. This hasn't disappointed and it's been about a month. I use this daily at a full sprint and regular walking/jogging as well. Like most treadmills in this price range, the belt width was something i didn't want to compromise on. I was weary after experiencing much wider belts at the gym, but this belt size didn't impact my running or workout. The quality is nice, it's heavy and well grounded. The panel is plastic and definitely not 'high-end' but unless you're expecting this to wow people with design, it's not even an issue. Easy to fold up and a cool slow release to fold back down. Just measure out your room and understand this will need a corner to hang out in as it doesn't fold completely down to hide under a bed or anything like that. Pros: -Easy to assemble. The box was a bit heavy - so have some help or get a dolly to help roll it around. It was well packed and even with a rough looking tear in the cardboard, the treadmill was nicely protected with foam, plastic wrap and more cardboard. Took maybe 30min to set it up. - The folding makes it easy to store in a corner and not take up space when not using. It's in my home office and doesn't crowd the room at all. - Simplicity. You turn it on and just go. The speed programs are nice, but lets be real, you're gonna be adjusting the speed manually most of the time. The screen is well lit, bright and has the basic information you need. Time..speed, distance..calories burnt etc.. - The speed controls are also on the right handle which is very convenient. Also, on the left handle, a basic Start/Stop option. I rarely touch the actual panel in the front to adjust speed or turn on. - The belt seems to be strong and it is easy enough to lubricate. I had to tighten the belt after feeling like it was slipping at a full sprint, but with the allen tool they provided, it was a very easy and simple fix. There are plenty of videos on youtube that will show you how to properly do this, as well as the user guide. - It runs quiet but once you start running it's a bit loud. But you're running on a metal board...so get headphones or turn on music. - You don't need to have some monthly subscription to actually use it. It is a basic treadmill. Start it. Run on it. Get fit. Find training videos on youtube.. they're free and effective. Cons: - The heart rate monitor doesn't seem to be accurate at all. I don't really care much about this especially since i use a fit bit. Again, it's not the point. You use this to run on. Keep your expectations within your price range. - Manual incline - but again, not a deal breaker. If you're wanting automatic/advanced inclines, you won't be spending under $500. - Handles have rough ends and sometimes while in a sprint, my hands/arms might graze them. It's not hard plastic, but just rough padding ends i guess. A bit annoying but nothing serious. - The two cupholders are a bit shallow, but they easily hold a typical bottle of water in place even when running on it. - It has an area for you place a tablet on the main panel, but it's not that large. I place my phone there though with no issues. Overall, it's a great entry level treadmill to have around your office or home gym. I enjoy walking on it, doing some HIIT exercises on it and jogging. I will always prefer real running, but this is a great option for cold weather and rainy days. The price is great, and it delivers a solid option to get into shape. Whether you choose this or another, don't get analysis paralysis! Get it ordered and on the way so you can hit those fitness goals! ... show more
Reviewed in the United States on November 30, 2020 by Skyler A.

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