Short throw 4K UHD gaming and home entertainment projector
Immerse yourself in a world of Ultra HD gaming, live sports and TV shows. The UHD35STx delivers impressive bright 4K UHD high-quality images, lightning-fast input lag as low as 4.2ms and a high refresh rate of 240Hz - perfect for a competitive gaming advantage.
Featuring a short throw lens, it can be placed just a few feet away from the projection area while creating a supersized 100" image.
Convenient and easy to set up this compact high brightness projector is ideal for well-lit environments so sports fans can enjoy live action with family or friends with the lights on. Boasting HDR and Amazing color technology, it delivers accurate true-to-life color reproduction for movie lovers.
An integrated speaker provides powerful sound and two HDMI inputs enable connection to multiple devices such as set-top boxes, games consoles and HDMI dongles. Weighing less than 7.7.6lbs, it can be taken to a friend’s house for a sports event, movie night or a gaming marathon - anywhere with a flat surface.
With 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.
Big screen entertainment
Create and view images far larger than any TV with a projector. You can create a massive up to 300” image*. Perfect for recreating the immersive cinema experience in the comfort of your own home.
*Screen size depends on space available (wall size and distance) and ambient lighting conditions.
This all-round home entertainment projector combines high brightness and vivid colors for vibrant, true-to-life visuals in well-lit environments* – ideal for watching TV shows, sports and movies or gaming with family or friends any time of day.
*With no direct sunlight or lights directed on screen.
True 4K UHD Resolution
Ultra 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.
Watch your movies, TV shows and play games with stunning colors in any environment. Optoma projectors provide reliable performance suitable for any content and environment. Our home projectors are capable of reproducing the Rec.709 color gamut, the international HDTV standard to guarantee accurate reproduction of cinematic color exactly as the director intended. Or more saturated colors for a punchy looking image, great for gaming and animated movies.
Enhanced gaming mode
Enhanced gaming mode optimizes your projector for maximum contrast and vivid colors to capture every detail. It also reduces input lag down to as little as 4.2ms (1080p 240Hz) for lightning-fast response times.
Note: When this setting is enabled some settings will be disabled. Please refer to the user manual for more information.*
240Hz smooth motion
Enjoy ultra-smooth fluid motion and reduced ghosting. A high refresh rate makes it easier to keep track of the action, giving you a better chance of hitting your target earlier. Ideal for fast action gaming.
*1080p240Hz PC gaming
HDR and HLG compatible
Capable 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.
This feature allows you to save your calibrated day and night mode settings for the highest possible viewing experience.
Dual HDMI inputs
Play 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.
Get right inside the action with the most immersive experience possible – a huge screen up to 300in.* Far larger than the average TV, split-screen multiplayer games are more enjoyable to play on the big screen.
Complete 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.
Most movies are shot at 24 frames per second (fps). To preserve the purity of the original image, Optoma projectors can accept high definition sources at 24 fps to display movies exactly as the director intended.
Use the USB-A port to power an HDMI dongle, such as Google Chromecast.
Four corner correction
Four corner correction enables the keystone of the projector to be adjusted in both the vertical and horizontal plane, so you can individually warp each corner of the projected image to make it perfectly square. Ideal for uneven walls or in spaces where the projector placement is awkward or limited and needs to be installed at an angle.
Wall color adjustment
Don’t have a white wall or a projector screen? No problem! With the “Wall Color” setting, you can alter the projected image based on the color of your wall. With six options to chose from you can easily adjust for blackboard, light yellow, light green, light blue, pink and grey walls to get the most accurate color gamut.
Our backlit remotes are designed using subtle white LEDs to light up the buttons, making it to see and operate, especially in the dark
Native aspect ratio
Aspect ratio - compatible
Keystone correction - horizontal
Keystone correction - vertical
Horizontal scan rate
31 ~ 135Khz
Vertical scan rate
24 ~ 120Hz
36.43" ~ 300.53" diagonal
Light source type
Lamp life hours (up to)
4000 (Bright), 15000 (Dynamic), 10000 (Eco)
15.75" - 129.92"
Focal length (mm)
|Inputs 2 x HDMI 2.0|
|Outputs 1 x Audio 3.5mm, 1 x S/PDIF, 1 x USB-A power 1.5A|
|Control 1 x RS232, 1 x 12V trigger|
Noise level (typical)
Noise level (max)
UHD, WQHD, WUXGA, FHD, UXGA, SXGA, WXGA, HD, XGA, SVGA, VGA, Mac
480i/p, 576i/p, 720p(50/60Hz), 1080i(50/60Hz), 1080p(50/60Hz), 2160p(50/60Hz)
Frame-pack: 1080p24, 720p50 / 60
Security bar, Kensington Lock, Password protected interface
OSD / display languages
10 languages: English, French, German, Italian, Japanese, Portuguese, Russian, Chinese (simplified), Spanish
5°C~40°C/41°F~104°F, max altitude 3000M/9843ft, max humidity 85%
Backlit home remote
Watts per speaker
In the box
AC power cord
2x AAA batteries
Basic user manual
100 ~ 240V, 50 ~ 60Hz
Power consumption (standby)
Power consumption (min)
Power consumption (max)
Weight and dimensions
Dimensions (W x D x H)
12.4" x 10.63" x 4.65"
ManualsArabic (عربى) (United Arab Emirates).pdf
Czech (Czech Republic).pdf
Farsi (فارسی) (Iran).pdf
Japanese (日本語) (Japan).pdf
Korean (한국어) (Korea).pdf
Vietnamese (Việt Nam) (Vietnam).pdf
Simplified Chinese (簡体中文) (China (simplified Chinese)).pdf
Traditional Chinese (China) (China).pdf