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BenQ

BenQ LH856UST Full HD 3,500-Lumen Ultra Short Throw Projector

Name: BenQ LH856UST Full HD 3,500-Lumen Ultra Short Throw Projector
Brand: BenQ
SKU: 9H.JS177.24E
Price: 1943.63 GBP
Availability: InStock

Return within 14 days

3-year manufacturer warranty

Installation services available

£1,943.63inc. VAT

£1,619.69 ex. VAT

In stock, dispatched within 2 working days

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Bought in the UK, backed in the UKWhy it matters →

In UK stock, ships from the UK
UK manufacturer warranty
UK-based engineers
No import duty or customs charges
GBP pricing, UK VAT invoices

Return within 14 days

3-year manufacturer warranty

Installation services available

Call 01342 580255

Key specifications

Brightness3500 ANSI lumens

Light Source LifeUp to 38,000 hours (Eco)

Native Aspect Ratio16:9

HDMI Inputs2x HDMI 2.0b (HDCP2.2)

Description

The BenQ LH856UST is a 1080p (1920x1080) interactive ultra-short-throw laser projector delivering 3500 ANSI lumens, aimed at classrooms and training rooms needing brighter, higher-contrast interactive projection than lamp-based alternatives. A 0.33 throw ratio allows near-wall or above-screen mounting to eliminate shadows and glare, and a laser light source rated up to 38,000 hours in eco mode substantially reduces maintenance versus traditional lamp projectors.

Also in this range:5,500-Lumen 4,600-Lumen 4,000-Lumen 5,000-Lumen Full specifications Datasheet Compare alternatives

A 3,000,000:1 dynamic contrast ratio and BenQ's Infographic Mode enhance the detail and colour saturation of text-heavy and graphic-rich educational content. Connectivity includes dual HDMI 2.0b inputs with HDCP2.2, VGA input, LAN (RJ45), USB Type-A and Mini-B, RS232 and a microphone input, plus twin 10W speakers for classroom-filling audio without external speakers.

With 2D keystone correction (+/-15 degrees) for simple short-throw alignment, the LH856UST suits schools and training centres upgrading to laser-based interactive projection, and is backed by BenQ's standard 3-year warranty.

Call 01342 580255

Key features

Laser Ultra-Short-Throw

A 0.33 throw ratio combined with a laser light source rated up to 38,000 hours in eco mode delivers bright, near-maintenance-free interactive projection close to the board.

High Contrast for Detail

A 3,000,000:1 dynamic contrast ratio and Infographic Mode sharpen text, graphics and infographic content for classroom and training use.

Built-In Microphone Input

A dedicated microphone input alongside twin 10W speakers lets the LH856UST double as a basic room PA system without additional audio hardware.

Classroom Connectivity

Dual HDMI 2.0b, VGA, LAN (RJ45), USB Type-A/Mini-B and RS232 cover typical classroom source and network management needs.

Technical specifications

Choose a section to view its specifications.

Display (5)

Brightness: 3500 ANSI lumens
Native Aspect Ratio: 16:9
Resolution: Full HD (1920 x 1080)
Contrast Ratio: 3,000,000:1
Aspect Ratio: 16:9

Connectivity (7)

HDMI Inputs: 2x HDMI 2.0b (HDCP2.2)
Other Video Inputs: VGA (D-sub 15-pin)
Network: LAN (RJ45)
USB Ports: USB Type-A, Mini-B
Control Port: RS-232
White Light Output: 3,500 ANSI lumens
Connectivity: 2 x HDMI 2.0b (HDCP 2.2), D-sub 15-pin in and out, LAN (RJ45), USB Type-A, USB Mini-B (PointWrite / service), RS-232

Audio (2)

Speaker: 2x 10W
Audio: 2 x 10 W speakers, 3.5 mm audio in and out, microphone in

Power & Physical (4)

Power Consumption: 170 W typical
Weight: 6.5 kg
Dimensions (WxHxD): 317.2 x 208 x 376.4 mm
Dimensions (W x D x H): 317.2 x 376.4 x 208 mm

Certifications & Warranty (1)

Warranty: 3 years

General (7)

Light Source Life: Up to 38,000 hours (Eco)
Projection Technology: DLP
Light Source: Laser, 20,000 hours normal / 38,000 hours eco / 60,000 hours dynamic dimming
Throw Ratio: 0.33:1
Zoom: Fixed
Keystone Correction: Vertical ±15°, horizontal ±15°
Noise Level: 34 dB normal, 32 dB eco

Call 01342 580255

Throw distance guide

With its 0.33:1 throw ratio, here's how far the projector needs to sit from the screen for common 16:9 image sizes. Try our throw distance calculator for your exact room.

Try a size

100"

16:9 diagonal image

Image

2.21 m × 1.25 m

Lens position

0.7 m

Side view: drag the projector to try its available lens positions

Position fits

Image size	Image dimensions	Lens distance
60"	1.33 m × 0.75 m	0.4 m
80"	1.77 m × 1.00 m	0.6 m
100"	2.21 m × 1.25 m	0.7 m
120"	2.66 m × 1.49 m	0.9 m
150"	3.32 m × 1.87 m	1.1 m

Planning from a real wall? Use the projector screen size calculator to upload a photo, preview the image to scale and find projectors that fit within your maximum available space. Replacing an existing projector? The projector replacement calculator checks whether this lens covers the ratio your current mount needs.

Distances are lens-to-screen, calculated from the manufacturer's stated throw ratio; allow for lens shift and mounting hardware. Always confirm against the manufacturer's installation guide before fixing mounts.

See it on your wall, to scale

Choose a picture size, then upload a wall photo, or scan the QR code and take it on your phone. We'll show the projected picture at its real size.

Picture size

100" 16:9 · 2.21 m × 1.25 m

On a computer, the QR code sends your phone photo straight back to this page.

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Complete your setup

Optional extras that fit this product. Tick anything you need and it joins the same basket — or add this product on its own from the buy box above.

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Video Conferencing

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Professional Installation

Want it installed by our AV experts? We offer professional on-site installation including mounting, cable management, and system configuration.

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Your Configuration

BenQ LH856UST Full HD 3,500-Lumen Ultra Short Throw Projector × 1£1,943.63

Total£1,943.63

inc. VAT

Documents

BenQ LH856UST user manual — BenQ published documentation (PDF)

Delivery & returns

Estimated delivery 10 Oct - 14 Oct. UK mainland delivery only. Some large or made-to-order items carry longer lead times, shown on the product page.

Unused items in original packaging can be returned within 14 days of delivery — see the returns policy for how business and consumer returns differ. Faulty items are covered under manufacturer warranty and by your statutory rights.

Full delivery & returns policy

Bought in the UK, backed in the UK

This item is in UK stock and ships to you from within the UK, so the order never crosses a customs border on its way to you.
The manufacturer warranty is honoured here in the UK. If something fails, you deal with us, not with an overseas seller in another time zone.
Our own UK-based engineers install, commission and support what we sell, and can attend site when a system needs hands on it.
Delivered within the UK mainland, so there is no import duty, customs charge or courier handling fee waiting for you on delivery.
Prices are in pounds sterling with proper UK VAT invoices, and purchase orders are accepted from approved education accounts: no currency conversion and no surprises at the door.

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Payment & security

Pay securely by card. Education customers can apply for a 30-day purchase order account.

Schools, colleges, sixth forms, universities and multi-academy trusts can order on invoice, with no card payment required. Purchase orders and credit terms are for education customers only.

All transactions are processed over an encrypted, secure checkout.

Purchase order & invoice terms