Enter a search term above and hit enter
Loading ring icon
Loading icon
Please wait...

Alexa supported 4K Ultra HD projector

Immerse yourself in a world of Ultra HD. The UHD51ALVe delivers the ultimate in smart home entertainment with bright 4K images and support for Alexa voice control. You can now enjoy accurate colours, crystal clear detail, and sparkling contrast for a stunningly immersive experience.

Alexa voice control provides instant setup allowing you to adjust the volume, switch inputs, launch content and more.

Packed with the latest technology and features, this compact UHD projector boasts High Dynamic Range (HDR) compatibility, HDMI 2.0, wireless, a built-in media player, IFTTT and PureMotion frame-interpolation processing which eliminates motion blurring or image judder.


4K UHD resolution and HDR compatible
Lights on viewing - 3200 ANSI lumens
Voice control - Amazon Alexa supported device
Feature packed - Built-in media player, wireless and PureMotion

Voice control

Control your projector with your voice using Alexa or Google Assistant. You can ask Alexa or Google to turn the projector on or off, adjust volume, switch inputs and more. Voice control is a natural way to interact with technology in the home and now owners of Amazon Echo or Google Home devices can simply control the projector with their voice.

Note: Alexa smart home control is only currently available in the UK and Germany. Google Assistant currently only works in the UK.

4K UHD Resolution

With over eight million pixels, Ultra HD 4K resolution brings four times more detail than Full HD, to deliver sharper, life-like images and richer colours - allowing you to sit closer to the screen and enjoy a more immersive experience.

4K UHD Resolution
HDR compatible

HDR compatible

Capable of receiving and displaying HDR meta data, Optoma HDR compatible projectors allow you to see far more detail and texture. Objects look more solid and life like and the extra detail creates a greater sense of depth. It’s like looking through a window.

Amazing colours

Amazing colours

Watch your movies, TV shows and play games with stunning colours in any environment. Optoma projectors provide reliable performance suitable for any content and environment. Our home projectors are capable of reproducing the Rec.709 colour gamut, the international HDTV standard to guarantee accurate reproduction of cinematic colour exactly as the director intended. Or more saturated colours for a punchy looking image, great for gaming and animated movies.

Vertical Lens Shift

Simplify installation with vertical lens shift, which provides a wider range of projector placement possibilities. This makes it easier to position the projector in your room and enables a wider range of screen size options.

Vertical Lens Shift


Using sophisticated frame-interpolation technology, advanced motion control processing eliminates motion blurring or image judder, even in high-speed action sequences.


This technology ensures all the information contained in an image is faithfully reproduced on the screen giving a stunning crystal clear, pin-sharp picture.



This mode makes it possible for the projector to reproduce more detailed shades of colour; to provide vivid, balanced colour for vibrant, natural looking images.

Built in media player

Built in media player

Watch movies directly from your projector without the need of a laptop or PC by using the built-in media player. Simply copy your files to a USB stick and watch them on the big screen.

Full 3D

Full 3D

Optoma projectors can display true 3D content from almost any 3D source, including 3D Blu-ray players, 3D broadcasting and the latest generation games consoles.

Colour Management System (CMS)

Display accurate lifelike colours to best match your viewing environment. This unique feature provides you with the flexibility to fine-tune the colour settings for optimal precision.

Colour Management System (CMS)
ISF modes

ISF modes

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



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.

Integrated speaker

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.



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



IFTTT (If This Then That) is a free web-based service that allows you to create chains of simple conditional statements, called applets. Applets are used to trigger events such as getting your projector to turn off when you leave the house.


EMEA standard warranty
EMEA standard warranty


Expert reviews

April 2019

The Optoma UHD51ALVe is a capable 4K projector at a very tempting price. Colours and brightness are its strengths making it a great contender for big match fans as you don't even need an entirely dark room to get a great picture.

Optoma has a really decent 4K projector here for not much money, especially when you throw in the 3D and Alexa skills; however, there is plenty of choice in this price range - especially if you are not that bothered about voice control or 3D.

We reckon that the Optoma UHD51ALVe is certainly worth adding to your list as you are getting a lot at a very attractive price.

Expert Reviews
February 2019

Content projected at 4K genuinely looks sharper than 1080p content and optical performance is good, too.

Once you’ve carried out basic brightness and contrast adjustments, brightness in both Cinema and Native modes exceeds that of the BenQ TK800, as does contrast.

The overall result is a surprisingly bright, colourful and clear image.

Overall, the Optoma UHD51ALVe is a cracking projector

Image quality is excellent, it supports 3D where the TK800 does not and image quality is excellent both optically and in terms of colour reproduction. Plus, the versatility of having vertical lens shift, albeit manual, makes it easier to set up and more tolerant of poor projector/screen positioning than the BenQ TK 800.

Trusted Reviews
January 2019

When that powerful lamp has a full screen of bright HDR goodness to feed, the image really “pops”. In fact, with such uniformly bright content the HDR lift is greater than with any other sub-£2000 projector I can think of.

There’s some decent subtlety in the UHD51ALVe’s HDR colour rendering, too, aided and abetted by the projector’s 4K resolution and a general freedom from colour banding issues.

But its 3D pictures still level out much brighter than those of most affordable 3D projectors.

For sports fans, the UHD51ALVe’s brightness and rich colours are very handy indeed. The same goes, too, for 3D fans – especially given how clear and detailed its 3D pictures look.

Owner reviews

Verified Review
Optoma UHD51ALVe
Amit Kumar Singh, ILFORD : United Kingdom, January 2019.Purchased from Box
It's a super bright projector,With smart functionalities including UHD and 3D capability,I am really impressed with the picture quality of the projector.


Display technology
UHD (3840x2160)
3,200 lumens
Contrast ratio
Native aspect ratio
Aspect ratio - compatible
Horizontal scan rate
31 ~ 135Khz
Vertical scan rate
24 ~ 120Hz
Screen size
0.87m ~ 7.68m (34.1" ~ 302.4") diagonal

Lamp info

Light source type
Lamp watts
Lamp life hours (up to)
4000 (Bright), 15000 (Dynamic), 10000 (Eco)


Throw ratio
1.21:1 ~ 1.59:1
Projection distance (m)
1.2m - 8.1m
Zoom type
Focal length (mm)
12.81 ~ 16.74
Lens shift
Vertical +10%
Native offset


Inputs 2 x HDMI 2.0, 1 x VGA (YPbPr/RGB), 1 x Audio 3.5mm
Outputs 1 x Audio 3.5mm, 1 x S/PDIF, 1 x USB-A power 1.5A
Control 1 x USB-A service, 1 x RS232, 1 x RJ45, 1 x 12V trigger, 1 x USB-A reader/wireless, 1 x USB-A wireless Alexa


Noise level (typical)
PC compatibility
2D compatibility
480i/p, 576i/p, 720p(50/60Hz), 1080i(50/60Hz), 1080p(50/60Hz), 2160p(50/60Hz)
3D compatibility
Side-by-Side:1080i50 / 60, 720p50 / 60 Frame-pack: 1080p24, 720p50 / 60 Over-Under: 1080p24, 720p50 / 60
Full 3D
Security bar, Kensington Lock, Password protected interface
OSD / display languages
10 languages: English, French, German, Italian, Japanese, Portuguese, Russian, Chinese (simplified), Spanish
Operating conditions
5°C ~ 40°C, Max. Humidity 85%, Max. Altitude 3000m
Remote control
Backlit home remote
Speaker count
Watts per speaker
In the box
Lens cap
AC power cord
Remote control
Basic user manual
Optional wireless models


Power supply
100 ~ 240V, 50 ~ 60Hz
Power consumption (standby)
Power consumption (min)
Power consumption (max)

Weight and dimensions

Net weight
Dimensions (W x D x H) mm
392 x 281 x 118
Verified owner

Recently viewed

This website uses cookies to give you the best online experience. If you'd like to know more or change your preferences, our Cookie Policy explains more.You consent to our cookies if you continue to use our website.