A lady runs on the SereneLife SLFTRD35 Foldable Treadmill 

SereneLife SLFTRD35 Foldable Treadmill 

The SereneLife SLFTRD35 Foldable Treadmill is an electric, digital, and home exercise machine. Its job description is to enable you to walk, jog, and run in the confines of your home.  

It has a 2.5 horsepower motor that provides a speed range of 0.6-10 mph, and an automatic incline that could be adjusted up to 15 levels for a variety of workout intensities.  

This treadmill has a lot in common with the Sunny Health & Fitness Energy Flex Treadmill. However, there are still significant differences though.  

That said, if you wish to have a peek at the best price of the SereneLife SLFTRD35 Foldable Treadmill, click right here.  

The Frame & Construction 

SereneLife SLFTRD35 Foldable Treadmill 
SereneLife SLFTRD35 Foldable Treadmill 

The SereneLife SLFTRD35 Foldable Treadmill’s frame is made of aluminum while other parts are made of plastic. It has a floor-friendly base that promotes stability. Nevertheless, it must be used on a surface that is even, and the use of a rubber mat could go a long way to make it a lot more stable.  

It supports a maximum user weight capacity of 285 lbs./129 kg, but it’s safe to not exceed 265 lbs./120 kg.  

This is a 116.85-lb./53-kg unit, but it could easily be moved around the room once folded because there are transport wheels and a lifting handle at the rear.  

The assembled dimensions are 61.42’’ long by 28.35’’ wide by 50.79’’ high. So, the treadmill it’s going to require a workout area with measurements of 5’11’’ length by 2’36’’ width, plus additional clearance of 2’ on each and the rear for safety and ease of access purposes.  

Obviously, the unit takes quite a bit of space that those in a small room may not be able to spare. However, it does not take as much space for storage due to its space-saving design.  

Once folded, the dimensions become 35.6’’ long by 28.4’’ wide by 55.9’’ high. Consequently, a storage area with measurements of 3’ length by 2’36’’ width will suffice.  

The Deck of the SereneLife SLFTRD35 Foldable Treadmill 

The deck’s running surface is not as wide and lengthy as a running treadmill should be, but enough to allow users that are up to 6’ tall to walk, job, and probably run as well.  

The tread belt dimensions are 47.3’’ in length by 16.5’’ wide.  

The Motor 

The motor’s capacity is 2.5 horsepower, and it is powerful enough to support your daily workout activities without breaking down or overheating.  

It is situated at the front base of the treadmill and covered with a plastic lid. Its operation is smooth and quiet which makes it home-friendly.  

The speed range it provides is 0.6-10 mph (1-16 km/h).  

There are 2 mph, 4 mph, 6 mph, 8 mph, quick speed buttons on the console, and the +/- gradual speed keys on the right handlebar. These enable you to increase your speed level significantly with a push of a button or gradually to tailor the speed to your fitness level.  

Another way the speed can be applied automatically is when one of the preset workout programs is selected.  

The Incline 

The SereneLife SLFTRD35 Foldable Treadmill has an automatic incline system. This means it has a small motor that lifts and lowers the ramp whenever it is adjusted.  

It is a 15-level incline system, and at its max, it equals 5.2 degrees.

So, this can help you to increase or decrease the level of your workout intensity.  

The adjustment could be done via the 2%, 4%, 8%, 12% quick buttons on the console, or via the +/- gradual keys on the left handlebar.  

Just as the speed, the incline could be applied automatically when one of the 12 preset workout programs is selected. 

The Console 

The console of the SereneLife SLFTRD35 Foldable Treadmill 
The Console

The console on this treadmill embodies features such as the backlit LCD monitor that tracks Time, Distance, Speed, Calories, and Heart Rate. 

It also integrates incline/speed quick and gradual adjustment buttons, start/stop/and pause buttons, program, mode, and safety key buttons.  

You will be able to engage in a workout upon turning the treadmill on, or you can select one of the 12 preset workout programs available. Set a countdown goal for Time, Distance, or Calories.  

Interestingly, the console is compatible with the FitShow workout app. You can connect to this app via your smartphone device; it is available in Google Play and App store as well. This means regardless of whether your phone is Android or iOS-based, it is compatible. 

Simply turn on the Bluetooth and a connection will be established without a password requirement.  


There are MP3, USB, and card reader ports that enable you to play music from a device and stream the audio output via the treadmill’s built-in speakers.  

In other words, you can play music on your smartphone, a flash drive, or a card reader and listen to it through the built-in speakers.  

Also, the dashboard consists of water bottle holders and a tablet holder. These are designed to keep water and a device handy for maintenance of hydration and entertainment purposes.  


A lady pushes the SereneLife SLFTRD35 Foldable Treadmill to storage

The SereneLife SLFTRD35 Foldable Treadmill is easy to store away because it is foldable with a hydraulic folding system that helps you to easily and safely fold and unfold it with less effort.  

Also, there are transport wheels integrated for the relocation process. Therefore, it can be moved around the room without hassle even though it weighs 116.85 lbs./53 kg.  

A storage area with measurements of 3’ length by 2’36’’ width will be accommodative.  

Pros/Features Overview 

  • Built to provide cardiovascular exercises in the comfort of your home 
  • It supports up to 285 lbs./129 kg maximum user weight capacity 
  • It’s got a powerful, yet energy-efficient 2.5 horsepower motor that provides a speed range of 0.6-10 mph 
  • It has a space-saving design with a hydraulic folding system  
  • Transport wheels included for easy relocation process 
  • Backlit LCD monitor tracks workout stats such as Time, Distance, Speed, Calories, and Heart Rate 
  • EKG contact grips for heart rate monitoring 
  • Bluetooth connectivity for FitShow app (free download available for Android and iPhone) 
  • 12 Preset workout programs 
  • 3 countdown goal settings (Time, Distance, and Calories) 
  • Automatic incline with 15 adjustable levels  
  • Built-in speakers 
  • Aux, USB, and card reader ports for MP3 audio playback 
  • Fairly easy to assemble 
  • Maintenance requirement is low 


  • Console is not telemetric (not compatible with wireless HR chest strap) 
  • It requires a little bit of space for workouts 
  • The running surface is not wide (47.3’’ L x 16.5’’ W) 



  • 1 Year limited warranty 

Product Dimensions & Specifications 

  • Length: 61.42’’ 
  • Width: 28.35’’ 
  • Height: 50.79’’ 
  • Folded dimensions: 35.6’’ L x 28.4’’ W x 55.9’’ H 
  • Shipping dimensions: 65.6’’ L x 30.5’’ W x 11.7’’ H 
  • Running surface dimensions: 47.3’’ L x 16.5’’ W 
  • Net weight: 116.85 lbs./53 kg 
  • Gross weight: 131.79 lbs./59.78 kg 
  • Maximum user weight capacity: 285 lbs./129 kg 
  • Frame material: Aluminum 
  • Motor: 2.5 horsepower 
  • LCD monitor: Backlit 
  • Bluetooth connectivity  
  • FitShow app compatible 
  • Programs: 12 presets 
  • Goal setting for Time, Distance, and Calories 
  • Incline: Automatic, 15 adjustable levels 
  • Transport wheels: Yes 
  • USB & auxiliary ports: Yes 
  • Water bottle and tablet holders: Yes 


The SereneLife SLFTRD35 Foldable Treadmill ships in a box that weighs 131.79 lbs./59.78 kg with dimensions of 65.6’’ long by 30.5’’ wide by 55.9’’ high. 

Major retailers such as Amazon ship it out free of charge and gets it delivered within a couple of days. It might be earlier or longer depending on your location. So, if you wish to know exactly how long it will take to get to you, then you must find out from the supplier.  


Most standard treadmills are usually not difficult to assemble because the complicated parts have been preassembled in the factory.  

Hence, you are only required to attach one or two things to the main core unit.  

This won’t take up to an hour. Moreover, an instruction manual and tools required for successful assembly are included in the package.  


The maintenance mainly includes cleaning the unit on a regular basis. Also, ensure to periodically check the parts to be sure they are tight and in good condition.  

When you feel the tread belt is not running smoothly as it should, lubricate it.  

Finally, store it in a cool, dry, and clean area, and prevent children from having access to it.  


The SereneLife SLFTRD35 Foldable Treadmill is a basic home cardiovascular machine. It supports a maximum user weight capacity of 285 lbs./129 kg and it integrates a powerful energy-efficient 2.5 horsepower motor that provides a speed range of 0.6-10 mph.  

It is Bluetooth-enabled and compatible with the FitShow app that is free and downloadable to Android and Apple phones.  

It has an automatic incline system with 15 adjustable levels that help you to experience a variety of workout intensities.  

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