The Sunny Smart Magnetic Under Desk Elliptical (SF-E3872SMART) is a compact, portable under-desk exerciser with 8 levels of magnetic resistance and a belt-drive system. It arrives fully assembled and weighs 25 lb, making it easy to move under a desk. Based on brand specs, it focuses on forward leg motion for low-impact seated exercise.
If you’re searching for a compact under-desk elliptical to keep your legs moving while seated, the Sunny Health & Fitness Smart Magnetic Under Desk Elliptical SF-E3872SMART is a model worth considering. Based on the brand’s published specs, this unit offers 8 levels of magnetic resistance and a belt-drive design for smooth pedaling.
The elliptical arrives fully assembled and measures 22.6 inches long, 18.5 inches wide, and 10.6 inches high. With a product weight of 25 lb, it is designed for easy transport and storage under a desk.

Published specs
| Spec | As published |
|---|---|
| Product Dimensions | 22.6L x 18.5W x 10.6H in |
| Product Weight | 25 lb |
| Resistance Levels | 8 |
| Resistance Type | Magnetic (belt-drive) |
| Pedal Type | Non-slip textured |
| Drive System | Belt drive |
| Assembly Required | No – fully assembled |
| Warranty | 1 year structural frame + 180 days other parts and components |
| Shipping Weight | 29.8 lb |
Who it suits
- Those who want to increase leg movement while sitting at a desk.
- Users seeking low-impact lower body exercise with adjustable resistance.
- Individuals with limited space who need a lightweight, portable elliptical.
Who should skip
- If you need a full-body workout – the pedals are for feet only, no upper body involvement.
- If you require a high-intensity cardio machine with arm handles or a display console (not stated by the brand).
- If you want a machine that allows reverse pedaling – the brand describes only forward motion.
Pros
- Fully assembled out of the box – no setup required.
- Compact size (22.6 x 18.5 x 10.6 inches) fits under most desks.
- 8 levels of magnetic resistance provide a range of effort.
- Belt-drive system for low maintenance and quiet operation.
Cons
- No handle for upper body workout – pedals are foot-only.
- Warranty period is limited: 1 year frame, 180 days parts (as per brand policy).
- No included display or fitness tracking features mentioned by the brand.
What It Is
The Sunny Smart Magnetic Under Desk Elliptical (model SF-E3872SMART) is a compact, portable under-desk exerciser designed to promote leg movement while seated. It uses magnetic resistance with a belt-drive system and offers 8 tension levels. The brand states it is fully assembled and ready to use out of the box.
Key Features as Published
- 8 levels of magnetic resistance – adjustable via tension knob for varied intensity.
- Belt-drive mechanism – low maintenance and smooth pedaling.
- Large textured foot pedals – non-slip surface for secure footing.
- Fully assembled – no tools or setup required.
- Lightweight and portable – product weight of 25 lb with carry handle.
Size and Dimensions
According to the brand, the product dimensions are 22.6 inches long, 18.5 inches wide, and 10.6 inches high. The unit weighs 25 lb, and the shipping box measures 25L x 20.3W x 12.4H inches with a shipping weight of 29.8 lb. This compact size is intended to fit under a standard desk.
Before You Buy
Check your desk clearance – the elliptical height is 10.6 inches. The unit is foot-only with forward motion; reverse pedaling is not mentioned in the brand’s specs. Warranty coverage includes 1 year on the structural frame and 180 days on other parts and components, as stated by Sunny Health & Fitness. No assembly is required.
See it on Sunny Health & Fitness
Frequently asked questions
Is the Sunny Smart Magnetic Under Desk Elliptical fully assembled?
Yes, based on the brand description, the elliptical arrives fully assembled and is ready to use right out of the box.
What is the weight capacity?
Not stated by the brand. The product weight is 25 lb, but a user weight limit is not provided in the published specs.
How many resistance levels does it have?
It has 8 levels of belt-drive magnetic resistance, adjustable via a tension knob.
Can I use it while standing?
The brand describes it as an under-desk elliptical for seated use with forward motion. Using it while standing is not mentioned in the published specs.
What is the warranty?
The warranty includes 1 year on the structural frame and 180 days on other parts and components, as stated by Sunny Health & Fitness.




