Dahua Digital Signage Current

LDH55-SAI400L V2

Dahua LDH55-SAI400L V2 55-inch Wall-mounted LCD Digital Signage Display

Screen size: 55 inch
Resolution: 3840 (H) × 2160 (V)
Brightness: 500 cd/m² (typ.)
System: Android 11.0

Priceon request

QuotationWithin 1 working day

DeliveryConfirmed with your quote, based on stock

PDFDownload datasheet

Overview

The Dahua LDH55-SAI400L V2 is a 55-inch indoor wall-mounted LCD display for 4K digital signage. It runs Android 11 on a quad-core processor, plays 4K video and offers 4 GB RAM, 32 GB storage, Wi-Fi and gigabit Ethernet. Landscape or portrait mounting suits lobbies and reception areas in Doha, Lusail and Al Rayyan. Request a quote for supply and installation.

A 55-inch 4K display for continuous wall-mounted signage

The Dahua LDH55-SAI400L V2 is an indoor LCD signage display built to run content for long working hours. Its 55-inch panel delivers 3840 x 2160 resolution in a 16:9 format, and the built-in Android 11 system plays scheduled programmes without an external media player. The manufacturer rates the unit for 24/7 operation, which suits reception walls and information screens that stay on from morning until evening.

Panel, processing and video playback

The panel is listed at 500 cd/m² typical brightness and 178° viewing angles both horizontally and vertically, so people standing beside a counter or walking along a corridor can read the content. The data sheet gives 1200:1 contrast for the IPS option and 4000:1 for the VA option, plus an 8 ms response time for moving images. Inside, a quad-core A55 processor at 1.92 GHz works with 4 GB RAM and 32 GB storage. It decodes H.265 and VP9 video up to 2160p at 60 fps and H.264 up to 2160p at 30 fps, so 4K loops can run from the internal player.

Connections, scheduling and remote management

The screen offers a gigabit RJ-45 Ethernet port that auto-negotiates 10/100/1,000 Mbps, and Wi-Fi covering 802.11 b/g/n/a/ac/ax, so you can choose cable or wireless. An HDMI 2.1 input accepts 4K at 60 Hz from a laptop or a separate source, while USB 2.0, USB 3.0 and a TF card slot (up to 128 GB) hold local files. Playlists can be scheduled by time and by location, split into adjustable zones and played in several modes. Because the unit operates on a browser-server model, a central platform can push content, control each display remotely and produce operation reports.

Where it fits in Qatar

Three common deployments suit this model:

Clinic or bank reception in Doha: a queue-information or service-announcement screen on a wall beside the desk, scheduled to change content through the day.
Corridor wayfinding in a school or university building: several units in Education City or Al Rayyan, each with its own floor directory, all managed from one platform.
Hotel or retail lobby in West Bay or The Pearl: a portrait-mounted screen beside a lift or entrance, showing offers, timetables or venue information.

Heat needs planning in Qatar. The operating range is 0 °C to +40 °C, and the manufacturer asks that the display avoid direct sunlight. Mount it inside an air-conditioned space, away from windows that receive afternoon sun. If the site is hotter than this range or exposed to dust, ask the SmartRooms Qatar team to review the location before the quotation is issued.

What to plan before installation

Net weight is 20.5 kg (25.3 kg gross), so the wall or frame must carry the load.
Dimensions with bracket: 1,232.6 mm x 703.4 mm x 27.5 mm (L x H x W).
VESA pattern of 400 x 400 mm, with a wall-mount bracket supplied with the unit.
Power input 100–240 VAC at 50/60 Hz; typical draw 123 W, maximum 152 W.
Standby consumption at or below 0.5 W.

A free site survey from SmartRooms Qatar lets the team check wall construction, cable routes and socket positions before installation is arranged. The unit is covered by the manufacturer's warranty. Use the quotation to confirm the bracket, installation and delivery to your municipality, and sign off with a purchase order or LPO if your organisation buys that way.

Request a quote for the Dahua LDH55-SAI400L V2 today, and tell us the room size, wall type and number of screens so we can prepare an accurate quotation, usually within one working day.

Highlights

55-inch 3840 x 2160 (4K) LCD panel, 16:9 landscape or portrait
500 cd/m² typical brightness and 178° viewing angles
Rated for 24/7 operation with Android 11 built in
Quad-core 1.92 GHz CPU, 4 GB RAM and 32 GB storage
Decodes H.265 and H.264 video up to 2160p
Gigabit Ethernet and Wi-Fi 802.11 a/b/g/n/ac/ax

Estimated timeline

Quotation within 1 working day · delivery timing depends on stock availability, and we confirm it with your quotation.

Specifications

46 specifications · Source: manufacturer · checked Oct 2026

LCD Panel11

Screen Size: 55 inch
Backlight: ELED
LCD Technology: IPS/VA
Aspect Ratio: 16:9
Brightness: 500 cd/m² (typ.)
Contrast Ratio: IPS 1200:1 (typ.) / VA 4000:1 (typ.)
Display Colors: 10 bit (8 bit + FRC), 1.07B colors
Resolution: 3840 (H) × 2160 (V)
Viewing Angle: 178° (H)/178° (V)
Response Time: 8 ms
Surface Treatment: Haze 25%

Built-in System5

Operating System: Android 11.0
CPU: 4 cores A55, 1.92 GHz
RAM: 4 GB
ROM: 32 GB
Video Decoding: H.265 HEVC MP-10@L5.1 up to 2160p@60 fps; H.264 AVC HP@L5.1 up to 2160p@30 fps; VP9 Profile 2 up to 2160p@60 fps; H.264 MVC up to 1080p@30 fps; MPEG-4 ASP@L5 up to 1080p@30 fps; WMV/VC-1 SP/MP/AP up to 1080p@30 fps;

Function3

Audio Compression: MPEG-3, WMA, WAV
Video Compression: MPEG-4, H.264 AVC/MVC, H.265 HEVC
Video Format: mp4, avi, mov, mkv, wmv

Device Ports7

Network Port: 1 × RJ–45 10/100/1,000 Mbps self-adaptive Ethernet port
Wi-Fi Standard: 802.11 b/g/n/a/ac/ax
Wi-Fi Frequency Range: 2400-2483.5 MHz, 5150-5350 MHz, 5470-5725 MHz, 5725-5850 MHz
MAX Power Transmission (Wi-Fi): ≤20 dBm@2400-2483.5 MHz; ≤23 dBm@5150-5250 MHz; ≤20 dBm@5250-5350 MHz; ≤27 dBm@5470-5725 MHz; ≤14 dBm@5725-5850 MHz
Data Transmission Ports: 1 × USB 2.0 (type A); 1 × USB 3.0 (type A) 1 × TF card slot, up to 128 GB
Video Input: 1 × HDMI 2.1 (4K@60 Hz)
Audio Port: 1 × 3.5 mm jack output

Speaker1

Built-in Speaker: 2 × 5 W

General18

Power Supply: 100–240 VAC, 50/60 Hz
Power Consumption: 123 W (typ.), 152 W (max)
Standby Power Consumption: ≤0.5 W
Operating Temperature: 0 °C to +40 °C (+32 °F to +104 °F) (avoid direct sunlight)
Storage Temperature: –20 °C to +60 °C (–4 °F to +140 °F)
Operating Humidity: 10%–85% (RH), non-condensing
Storage Humidity: 10%–90% (RH), non-condensing
Product Material: Metal casing
Casing Color (Frame/Rear): Black
Product Dimensions: 1,232.6 mm × 703.4 mm × 25.0 mm (48.53" × 27.69" × 0.98") (L × H × W) (without bracket) 1,232.6 mm × 703.4 mm × 27.5 mm (48.13" × 27.35" × 1.08") (L × H × W) (with bracket)
Frame Size: 10.3 mm (0.41") (T/L/R/B)
Packaging Dimensions: 1,324 mm × 130 mm × 805 mm (53.4" × 5.9" × 33.6") (L × W × H)
Net Weight: 20.5 kg (45.19 lb)
Gross Weight: 25.3 kg (55.78 lb)
Wall Mount VESA: 400 mm × 400 mm (15.75" × 15.75")
Installation: Wall mount
Display Mode: Landscape/Portrait
Accessory: Wall-mount bracket, user manual, legal and regulatory information, energy label, remote control

Certification1

Certifications: CE EMC, CE LVD, CE ERP, RED

Downloads

10 files from the manufacturer

PDF Datasheets LDH55-SAI400L.pdf 6.3 MB PDF Datasheets LDH55-SAI400L_datasheet_20260112.pdf 3.2 MB PDF Manuals & guides Dahua Digital Signage_Quick Start Guide_V1.0.0.pdf 239 KB PDF Manuals & guides Dahua Digital Signage_User Manual_V1.0.0.pdf 4.4 MB PDF Manuals & guides LDH55-SAI400L_INSTALLATION_PROCEDURE.pdf 164 KB PDF Drawings & CAD LDH55-SAI400L_DIMENSIONS.pdf 1.6 MB PDF Drawings & CAD LDH55-SAI400L_PORT.pdf 295 KB 2511 Software & firmware · Opens on manufacturer site DH_LDM-A(T982)_MultiLang_Android_V3.000.0000002.0.R.251126 2511 Software & firmware · Opens on manufacturer site DH_LDM-A(T982)_MultiLang_Android_V3.000.0000002.0.R.251126_Release Notes DOCX Other documents LDH55-SAI400L_A&E_20251223114744.docx 41 KB

Questions about LDH55-SAI400L V2

What is the Dahua LDH55-SAI400L V2 designed for?

It is an indoor, wall-mounted 55-inch LCD display for digital signage, used for menus, announcements, wayfinding and promotional loops. It suits reception areas, corridors and waiting rooms where one screen needs to show scheduled content without a separate media player. Its 4K panel and built-in Android 11 system let the unit play rich video and images on its own, which keeps cabling simple in offices, clinics and schools across Qatar.

Is it built for continuous, round-the-clock operation?

Yes, the manufacturer rates it for 24/7 operation. It has an industrial-grade panel and a black metal casing, and standby consumption is at or below 0.5 W. Operating range is 0 °C to +40 °C with 10–85% non-condensing humidity, and storage range is -20 °C to +60 °C. These figures matter when choosing a spot for a lobby screen that runs from early morning until late evening.

How bright and readable is the screen in a sunlit or busy space?

The panel is rated at 500 cd/m² typical brightness, with 178° viewing angles and a 25% haze surface treatment. The haze finish softens reflections from windows and ceiling lights, which helps in a reception hall with glazing. Contrast is listed at 1200:1 for IPS and 4000:1 for VA. For a bright atrium, check the wall position against windows before the quotation is issued so SmartRooms Qatar can flag glare sources during the site survey.

Which video formats and resolutions can it play?

It decodes H.265 HEVC up to 2160p at 60 fps, H.264 AVC up to 2160p at 30 fps and VP9 Profile 2 up to 2160p at 60 fps, plus H.264 MVC, MPEG-4 and WMV/VC-1 up to 1080p. Supported file containers include mp4, avi, mov, mkv and wmv, and listed audio formats include MPEG-3, WMA and WAV. A 4K loop encoded in H.265 can run directly from the internal player without an extra device.

How do I connect laptops, media players and the network?

The unit has an HDMI 2.1 input that accepts 4K at 60 Hz, a gigabit RJ-45 Ethernet port (10/100/1,000 Mbps, self-adaptive) and Wi-Fi supporting 802.11 b/g/n/a/ac/ax. It also has USB 2.0 and USB 3.0 Type A ports, a TF card slot up to 128 GB and a 3.5 mm audio output. In a school corridor without spare wall ports, Wi-Fi may be the simpler route, while many facilities prefer wired Ethernet for fixed displays.

Can one person manage content on many screens across a campus?

Yes. The unit uses a browser-server architecture, so a central management platform can publish programmes to each display, manage them by time and location, control them remotely and generate operation reports. For a university with screens on several floors, that means updating timetables or announcements from one place instead of visiting each wall. Ask SmartRooms Qatar to confirm the management setup for your project when you request a quotation.

Will it cope with Qatar's summer temperatures?

Its operating range is 0 °C to +40 °C, and the manufacturer asks that it avoid direct sunlight. In Qatar, where outdoor temperatures can exceed 45 °C in summer, the screen should be installed inside an air-conditioned building and kept away from west-facing glazing. Measure the room temperature near the planned wall position before ordering, and ask the SmartRooms Qatar team to review any location that is not air-conditioned.

Can it be mounted in portrait orientation?

Yes. The display mode is listed as landscape or portrait, so the 16:9 panel can be rotated for a tall column, a narrow corridor wall or a lift lobby. The wall-mount bracket is supplied with the unit, and the 400 x 400 mm VESA pattern sets the fixing points for the wall plate. Check that the wall plate, mounting height and cable route all work in portrait before the unit is ordered.

What should I plan before wall-mounting it in a Doha office?

Plan for the weight first: the unit is 20.5 kg net and 25.3 kg gross, measuring 1,232.6 mm long, 703.4 mm high and 27.5 mm thick with the bracket fitted. Confirm that the wall can carry the load, that the 400 x 400 mm pattern lines up with the fixings, and that a power socket and network point are within reach. A free site survey from SmartRooms Qatar checks these points before installation is arranged.

Can I connect it to Qatar's 240 V power supply?

The power input is listed as 100–240 VAC at 50/60 Hz, a range that covers Qatar's 240 V, 50 Hz mains. Typical consumption is 123 W, with a maximum of 152 W. The source data does not list the plug type, so ask SmartRooms Qatar to confirm the supplied cable and the socket type needed before installation.

Can a government ministry or school buy it through an LPO or tender?

Yes. SmartRooms Qatar accepts purchase orders (LPOs), government tenders including Monaqasat, and payment by bank transfer, cheque or purchase order. A school ordering several units to refresh corridor signage can receive the screens, brackets and installation in one quotation that matches the LPO. Quotations are usually issued within one working day, and the product is covered by the manufacturer's warranty.