Skip to main content
Out of stock
This item is currently out of stock and it may or may not be restocked.
Sold by Newegg

Shipped by Newegg

Shop it at NeweggBusiness.

Optoma Technology 4K400STx 4000-Lumen 4K UHD Short-Throw DLP Projector

  • Brightness of 4000 Lumens
  • UHD 4K 3840 x 2160 Native Resolution
  • Project up to 300"" Images
  • 4.2 ms Refresh & 1080p240 Gaming
  • HDR/HLG for Increased Depth
  • sRGB and CMS Color Support
  • Dual HDMI Inputs
  • USB-A Port to Charge/Power Devices
  • Four-Corner Keystone Correction
  • Backlit Remote Control Included
Overview
Reviews
See all Q & A

Any questions? Ask CelesteSM will help you find out quickly.

Bright, True 4K UHD short throw projector for classrooms and meeting spacesDiscover the short throw version of the 4K400x, for when you want a big screen in a smaller space. Future proof your classroom or meeting room with this high brightness True 4K UHD short throw projector. The 4K400STx delivers rich visuals in any environment even when total ambient light control is not possible. This projector boasts two HDMI ports, audio connections, USB to power 5V devices, 12V trigger and an RS232 to integrate into your existing control solution. In addition, enjoy 1080p in 240Hz with 4.2 ms input lag when connected to a PC.

Short ThrowWith a short throw lens, you can project an impressive 100" image from just over a meter away. This allows you to place the projector closer to the wall, reducing shadows so you can present with ease. True 4K UHD resolutionUltra HD 4K resolution delivers sharper, life-like images and richer colors - allowing you to sit closer to the screen and enjoy a more immersive experience. Our DLP projectors provide CTA (Consumer Technology Association) approved True 4K UHD resolution, capable of projecting 8.3 million on screen pixels. That's four times more detail than Full HD and twice as many from competing technology, which only delivers 4.1 million pixels.

HDR and HLG compatibleCapable of receiving and displaying both HDR10 and Hybrid Log Gamma (HLG) HDR content. This Optoma projector allows you to see far more detail and texture. Objects look more solid and lifelike and the extra detail creates a greater sense of depth. Lights on viewingThis versatile projector combines high brightness and vivid colors for vibrant, true-to-life visuals in any environment. Make a lasting impression with bigger and bolder presentations any time of day. Dual HDMI inputsPlay games, stream videos and share photos on the big screen in the comfort of your own home.

With dual HDMI inputs, you can easily connect to your games console, set-top box, laptop, PC, Blu-ray player or media streamer with a single cable. You can even turn it into a smart projector by connecting an HDMI dongle like the Google Chromecast, Amazon Fire TV, Apple TV or Roku stick. Amazing colorOptoma projectors provide reliable color performance suitable for any content and environment. From accurate sRGB colors for lifelike images to vibrant punchy presentations. We have a display mode to specifically meet your needs. Perfect for a range of graphic and video presentations.

Color Management System (CMS) Display accurate lifelike colors to best match your viewing environment. This unique feature provides you with the flexibility to fine-tune the color settings for optimal precision. ISF modesThis feature allows you to save your calibrated day and night mode settings for the highest possible viewing experience. Integrated speakerComplete your home entertainment experience with the convenience of a powerful built-in speaker for exceptional sound quality and an easy set up without the need for costly external speakers. USB-PowerUse the USB-A port to power an HDMI dongle, such as Google Chromecast. Four corner correctionAdjust the keystone in both the vertical and horizontal plane.

You can individually warp each corner of the image to create a perfectly square image. Ideal for uneven walls or where projector placement is awkward and needs to be installed at an angle. Backlit remoteOur backlit remotes are designed using subtle white LEDs to light up the buttons, making it to see and operate, especially in the dark.

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

  • Limited Warranty period (parts): 1 year
  • Limited Warranty period (labor): 1 year
  • Read full details

Return Policies

    We want to ensure your holiday shopping this year is hassle-free. That’s why we’re automatically extending our return policies on almost every product! For purchases placed between November 1st, 2026 and December 31, 2026 you will have until January 31, 2027 to return your product.

  • Return for refund until: January 31, 2027
  • Return for replacement until: January 31, 2027
  • This item is covered by Newegg.com's Extended Holiday Return Policy.
  • Read full return policy for details.
LOADING...

The Optoma 4K400STx is a 4,000-lumen short-throw 4K UHD DLP projector for classrooms, meeting rooms, and home setups that need a large image—up to 300 inches—from a shorter projection distance.

Recommended For

  • Classrooms and meeting rooms that need a large, detailed image from a short distance and cannot fully darken the room; Optoma positions the projector for education and business use, and its 4,000-lumen rating supports brighter-room presentations.
  • Golf-simulator owners setting up in a garage or bonus room who need a short-throw projector that can mount near the screen and keep the image visible with some room lighting; simulator discussions describe using it for this setup.
  • PC gamers who prioritize low input lag at high refresh rates and are comfortable gaming at 1080p for 240Hz; the 4.2ms mode is tied to 1080p, rather than 4K.
  • Small-room movie and sports viewers who want a large 4K image without placing the projector far from the screen, and are willing to connect separate streaming and audio equipment.

Spec Summary

AttributeValue
Best ForClassroom, meeting, educational, and home-entertainment projection, including use with a laptop or gaming console
Display And Image QualityDLP projection with native 3840 × 2160 resolution, 16:9 aspect ratio, 1,000,000:1 contrast ratio, and HDR10/HLG support
Brightness4000 ANSI lumens maximum white brightness; another brightness field lists 3600 lumens
Projection Range And Geometry150–300.48-inch image size with a listed throw distance of 1.31–10.8 feet; short-throw design with vertical keystone correction
Ports And ConnectivityUSB and HDMI connectivity
Light Source And PowerLamp light source rated for 4000 hours; 240W lamp wattage, 320W listed wattage, and 240V voltage
Controls And MountingRemote and button controls; ceiling-mount form factor
Size And Weight10.6 × 12.4 × 4.7 inches; item weight 2 kg
Included ItemsProjector, AC power cord, remote, battery, and basic user manual
Model IdentifiersOptoma Technology 4K400STx DLP Projector