For a first step into 9K resin
Elegoo Mars 4
An MSLA resin printer with a 7-inch 9K mono screen, a 153.36 × 77.76 × 175 mm build volume, and XY accuracy advertised at 18 µm per Elegoo.
In short The Elegoo Mars 4 is an resin (MSLA) 3D printer with a 153.36 × 77.76 × 175 mm (6 × 3.1 × 6.9 in) build volume. Elegoo claims a 7-inch 9K LCD, 18 µm XY resolution and up to 70 mm/h; the printer measures 227 × 227 × 438.5 mm (8.9 × 8.9 × 17.3 in) and weighs 5.5 kg (12.1 lb).
Documentary analysis · Not personally tested
Resin · MSLAWhy consider it?
A 7-inch 9K mono screen at 8520 × 4320 pixels, a COB light source with 36 LEDs, XY accuracy advertised at 18 µm, and a speed advertised up to 70 mm/h per Elegoo.
What to verify
The build volume stays compact (153.36 × 77.76 × 175 mm), so larger parts need splitting or a bigger printer. Exact bundle contents should be checked on the retailer's listing.
Elegoo Mars 4 specifications
- Technology
- Resin (MSLA)
- Build volume
- 153.36 × 77.76 × 175 mm (6 × 3.1 × 6.9 in)
- Printer dimensions
- 227 × 227 × 438.5 mm (8.9 × 8.9 × 17.3 in)
- Weight
- 5.5 kg (12.1 lb)
- Enclosure
- Protective cover
- LCD screen
- 7 in · 9K
- XY resolution
- 18 µm
- Claimed print speed
- 70 mm/h
- Multicolor
- One resin at a time; no automatic color or material switching.
- Materials
- Compatible 405 nm UV resins for MSLA, each with its own profile per Elegoo, with a built-in air purifier to cut odor.
- Screen
- 3.5-inch touchscreen
- Connectivity
- USB
- Listed features
- Built-in air filtration
How much space does it need?
The Elegoo Mars 4 measures 227 × 227 × 438.5 mm (8.9 × 8.9 × 17.3 in) for a 153.36 × 77.76 × 175 mm (6 × 3.1 × 6.9 in) build volume: the dashed box is the printer, the solid cube the largest theoretical part, about 9% of the machine’s volume. Add room for the spool or multicolor unit, cables and ventilation.
Source: official Elegoo pages (elegoo.com), checked September 28, 2026. Manufacturer claims, not our measurements. Build volume is nominal: orientation, supports and reserved zones can reduce the usable space.
Which projects is it for?
The Mars 4 targets beginners and creators who want 9K resolution in a compact footprint, with a 153.36 × 77.76 × 175 mm build volume per Elegoo, suited to detailed miniatures, game pieces, small prototypes, and tabletop terrain.
The advertised speed of up to 70 mm/h stays modest compared with newer tilt-release models, but fits regular hobbyist use rather than high-volume production runs.
Materials and setup
The 7-inch 9K mono screen at 8520 × 4320 pixels, paired with a 36-LED COB light source, targets XY accuracy advertised at 18 µm per Elegoo, with fan and copper-tube heat dissipation designed to extend the LCD screen's service life over repeated print sessions.
The laser-engraved build plate improves part adhesion during printing and makes removal easier per Elegoo, a useful detail when working with more brittle resins.
What the bundle includes or not
Elegoo advertises an upgraded built-in air purifier and the Voxeldance Tango slicer with static and dynamic (smooth and high-speed) print modes. Exact accessories included (starter resin, tools) should be checked on the retailer's listing.
The GOO file format stays open-sourced and compatible with third-party slicing software per Elegoo, leaving the slicer choice open instead of locking users into Voxeldance Tango alone.
Alternatives to compare
For a larger plate with a similar resolution, the Saturn 3 Ultra steps up to 218.88 × 122.88 × 260 mm per Elegoo. For a newer model from the same manufacturer, the Mars 5 is worth comparing.
The resin printer buying guide helps compare the Mars 4 against other 9K printers based on budget and the volume you need.
Similar printers to compare
Sources and limits
- Source: official Elegoo pages (elegoo.com), checked September 28, 2026. Manufacturer claims, not our measurements.
- How we assess specifications
We have not measured noise, real printing speed, accuracy or reliability, so none of these is rated here.