Bright, True 4K UHD short throw projector for classrooms and meeting spaces
Discover 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 4.2ms input lag when connected to a PC.

Short Throw
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.

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.

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.

Lights on viewing
This 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 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.

Amazing color
Optoma 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 modes
This feature allows you to save your calibrated day and night mode settings for the highest possible viewing experience.

Integrated speaker
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.

USB-Power
Use the USB-A port to power an HDMI dongle, such as Google Chromecast.

Four corner correction
Adjust 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 remote
Our backlit remotes are designed using subtle white LEDs to light up the buttons, making it to see and operate, especially in the dark

Display
Built-in display	No
Ports & interfaces
HDMI ports quantity	2
DVI port	No
USB 2.0 ports quantity	1
Serial interface type	RS-232
Headphone outputs	1
S/PDIF out port	Yes
Lens system
Fixed focal length	7.51 mm
Zoom type	Fixed
Offset	116%
Weight & dimensions
Weight	3.98 kg
Width	315 mm
Depth	270 mm
Height	118 mm
Package weight	4.68 kg
Power
Power source	AC
Power consumption (typical)	220 W
Power consumption (standby)	0.5 W
Power consumption (max)	320 W
AC input voltage	100 - 240 V
AC input frequency	50 - 60 Hz
Operational conditions
Operating temperature (T-T)	5 - 40 °C
Operating relative humidity (H-H)	0 - 85%
Operating altitude	0 - 3000 m
Network
Smart TV	No
Ethernet LAN	No
Wi-Fi	No
Projector
Projector brightness	4000 ANSI lumens
Projection technology	DLP
Projector native resolution	2160p (3840x2160)
Contrast ratio (typical)	1000000:1
Native aspect ratio	16:9
Smart projector	No
Screen size compatibility	925.3 - 7633.5 mm (36.4 - 300.5")
Supported aspect ratios	4:3, 16:9
Uniformity	80%
Horizontal scan range	31 - 135 kHz
Vertical scan range	24 - 120 Hz
Keystone correction, horizontal	-40 - 40°
Keystone correction, vertical	-40 - 40°
Video
Analog signal format system	Not supported
Full HD	Yes
3D	Yes
Supported graphics resolutions	3840 x 2160
Supported video modes	2160p
Storage
Card reader integrated	No
Packaging content
Remote control included	Yes
Batteries included	Yes
Cables included	AC
Design
Product type	Short throw projector
Market positioning	Home cinema
Product colour	White
Cable lock slot	Yes
Cable lock slot type	Kensington
Features
Noise level	28 dB
Interactive	No
On Screen Display (OSD)	Yes
On Screen Display (OSD) languages	Simplified Chinese, German, English, Spanish, French, Italian, Japanese, Portuguese, Russian
Number of OSD languages	10
Multimedia
Built-in speaker(s)	Yes
RMS rated power	10 W
Number of built-in speakers	1
Light source
Light source type	Lamp
Service life of light source	10000 h
Lamp power	240 W
Lamps quantity	1 lamp(s)