Dahua Digital Signage Current

LDH55-SAI400L V1

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

Resolution: 3840 (H) × 2160 (V)
Brightness: 500 cd/m² (typ.)
System: Android 11.0
Contrast: IPS 1200:1(typ.) / VA 4000:1(typ.)

Priceon request

QuotationWithin 1 working day

DeliveryConfirmed with your quote, based on stock

PDFDownload datasheet

Overview

The Dahua LDH55-SAI400L is a 55-inch wall-mounted LCD signage display with a 4K panel, an Android 11 player and an optional external Wi-Fi module. Its 16:9 screen at 3840 × 2160 resolution, 500 cd/m² typical brightness and built-in 2 × 5 W speakers suit reception areas, corridors and waiting rooms. Scheduled content and operation reports can be managed centrally from offices in Doha, Lusail and Al Khor.

What this wall-mounted signage display does

The Dahua LDH55-SAI400L is a 55-inch LCD display built to run scheduled playlists, wayfinding screens and information boards on a wall. It combines a 16:9 4K panel with an Android 11 player inside a single black metal casing, so there is no separate media box to hide or mount. Content is scheduled and pushed from a central platform, which suits organisations that need identical messages on several screens.

Display and playback facts that matter

Resolution: 3840 × 2160 pixels on a 55-inch panel with a DLED backlight.
Brightness: 500 cd/m² typical, with contrast rated at 1,200:1 typical for IPS and 4,000:1 typical for VA.
Decoding: H.265 and VP9 up to 2160p at 60 fps, and H.264 up to 2160p at 30 fps.
Layout: intelligent split screen lets you arrange zones freely in landscape or portrait display modes.

The source rates the panel for up to 24 hours of operation a day, which matters in lobbies and corridors that stay lit and switched on through the working day and beyond. The 178-degree horizontal and vertical viewing angles keep text readable for people standing well to the side of the screen.

Connectivity, storage and remote control

The main network link is a RJ-45 port with 10/100/1000 Mbps self-adaptive Ethernet. The device has a quad-core processor, 4 GB of RAM and 32 GB of internal storage. An external Wi-Fi module is optional, and Bluetooth is not supported. Ports include one HDMI 2.1 input, one USB 2.0 port, one USB 3.0 port, a TF card slot up to 128 GB and a 3.5 mm audio output. There is no video output, so the signal cannot be passed on to another screen. Management runs on a browser-to-server architecture with encrypted data transmission, multi-level approval before a program is released, terminal password protection and operation reports.

Where it fits in Qatar

A government service centre in Msheireb showing queue numbers and service information near the counters, with updates scheduled in advance by the facilities team.
A private clinic in Al Sadd using a waiting room screen to rotate health information and appointment notices between sessions.
A hotel or serviced apartment lobby near the Hamad International Airport area showing welcome messages and local information to arriving guests.

Planning the installation

The unit weighs 15.5 kg net and 22 kg gross, and the wall-mount bracket is included. It mounts on a 400 × 400 mm VESA pattern and measures 1,222.4 mm × 694.8 mm × 58.1 mm without the bracket. Before mounting, a site survey should confirm the wall construction, cable routes and a suitable viewing height. The operating range is 0 °C to +40 °C with direct sunlight avoided, so this model belongs in air-conditioned indoor spaces, not outdoor areas or sun-facing glazed entrances, where Qatar summer temperatures can exceed 45 °C. Power is rated 100–240 VAC at 50/60 Hz, with typical consumption of 100 W and a maximum of 140 W.

To request a quote, send SmartRooms Qatar your room list, mounting heights and the number of screens. We usually return a quotation within one working day, and purchase orders and government tenders are welcome.

Highlights

55-inch 16:9 panel at 3840 × 2160 resolution
500 cd/m² typical brightness with DLED backlight
Android 11 player with quad-core CPU and 4 GB RAM
Decodes H.265 and VP9 up to 2160p at 60 fps
Rated for up to 24 hours of operation a day
Wall-mount bracket included, VESA 400 × 400 mm

Estimated timeline

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

Specifications

48 specifications · Source: manufacturer · checked Oct 2026

LCD Panel11

Panel Dimensions: 55 inch
Backlight: DLED
LCD Technology: IPS/VA
Aspect Ratio: 16: 9
Brightness: 500 cd/m² (typ.)
Contrast: 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 (typ.)
Surface Treatment: Haze 2%

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@60 fps MPEG-4 ASP@L5 up to 1080p@60 fps (ISO-13818) WMV/VC-1 SP/MP/AP up to 1080p@60 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 Ports8

Network Port: 1 × RJ–45 10/100/1000 Mbps self-adaptive Ethernet port
Wi-Fi: Optional (External Wi-Fi module)
Bluetooth: NO
Data Transmission Ports: 1 × USB 2.0 ports (type A) 1 × USB 3.0 ports (type A) 1 × TF card slot, up to 128 GB
Video Input: 1 × HDMI 2.1 (4K @60Hz)
Video Output: NO
Audio Port: 1 × 3.5 mm jack output
IR Receiver: Yes

Speaker1

Built-in Speaker: 2 × 5 W

General General17

Power Supply: 100–240 VAC, 50/60 Hz
Power Consumption: 100 W (typ.), 140 W (max)
Standby Power Consumpton: ≤ 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)
Operatng Humidity: 10%–85% (RH), non-condensing
Storage Humidity: 10%–90% (RH), non-condensing
Product Material: Metal casing
Casing Color (Frame/Rear): Black
Product Dimensions: 1,222.4 mm × 694.8 mm × 58.1 mm (48.13" × 27.35" × 2.29") (without bracket)
Packaging Dimensions: 1357 mm × 150 mm × 853 mm (53.43" × 5.91" × 33.58")
Net Weight: 15.5 kg (34.17 lb)
Gross Weight: 22 kg (48.50 lb)
Installation: Wall mount
Display Mode: Landscape/Portrait
Wall Mount VESA: 400× 400mm
Accessory: Wall-mount bracket, power cord, legal and regulatory information, energy label, user's manual, remote control

Certification3

Certifications: CE EMC, CE LVD, CE ERP
Type: Model Description
LCD Digital Signage: DHI-LDH55-SAI400L Dahua 55 inch Wall-mounted LCD Digital Signage

Downloads

9 files from the manufacturer

PDF Datasheets LDH55-SAI400L_20241105.pdf 554 KB PDF Datasheets LDH55-SAI400L_V1_datasheet_20241101.pdf 3.4 MB PDF Manuals & guides Digital Signage_Quick Start Guide_V1.0.0_20241025.pdf 1.8 MB PDF Manuals & guides Digital Signage_User's Manual_V1.0.0_20241022.pdf 5.6 MB PDF Manuals & guides LDH55-SAI400L_INSTALLATION_METHOD_EN.pdf 12 KB PDF Drawings & CAD LDH55-SAI400L_DIMENSIONS.pdf 40 KB PDF Drawings & CAD LDH55-SAI400L_PORT.pdf 15 KB 2511 Software & firmware · Opens on manufacturer site DH_LDM-A(T982)_MultiLang_Android_V3.000.0000002.0.R.251126 DOCX Other documents LDH55-SAI400L_A&E_20260908161757.docx 40 KB

Questions about LDH55-SAI400L V1

What is the Dahua LDH55-SAI400L best used for?

It is a 55-inch wall-mounted LCD signage display with a built-in Android 11 player, so it can show scheduled content without a separate media box. Typical sites include reception areas, corridors and waiting rooms in government offices, clinics and hotels across Qatar. Choose it when you want one wall screen that runs its own playlists and is managed from a central platform.

Can this display run all day in a busy lobby?

Yes. The source rates the panel for up to 24 hours of operation a day. For a lobby in Msheireb or a corridor in Lusail that stays lit through office hours and into the evening, that rating matters as much as brightness. Keep the room within the 0 °C to +40 °C operating range to get the full benefit.

What are the resolution, brightness and orientation options?

The panel is 55 inches at 3840 × 2160 pixels in a 16:9 aspect ratio, with 500 cd/m² typical brightness. It supports landscape and portrait display modes, so one model can serve as a wide welcome screen or a vertical directory. Contrast is rated at 1,200:1 typical for IPS and 4,000:1 typical for VA.

Which video formats and codecs does the player support?

The player decodes H.265 HEVC and VP9 up to 2160p at 60 fps, and H.264 AVC up to 2160p at 30 fps. MPEG-4, WMV and H.264 MVC are supported up to 1080p at 60 fps. The listed file formats are mp4, avi, mov, mkv and wmv, which covers most files exported from common design and video editing tools.

Does it have Wi-Fi and Bluetooth?

Wi-Fi is optional through an external module, so you must order it if you need wireless connection. Gigabit-class Ethernet is built in through an RJ-45 port with 10/100/1000 Mbps self-adaptive operation. Bluetooth is not supported. For most fixed installations in Doha offices, planning around the wired port is the simpler route.

How are several screens managed from one office?

The device works with a unified platform that schedules content by time and location, generates operation reports and allows remote control. A multi-level permission review must approve each program before release, and terminal passwords protect every unit. Facilities teams running signs across several sites in Doha and Al Rayyan can manage them from one place.

Can it be installed near a window or outdoors in summer?

No. The operating range is 0 °C to +40 °C, and the source advises avoiding direct sunlight. Summer temperatures in Qatar can exceed 45 °C, so keep the unit in an air-conditioned indoor space away from glazed walls and sun-facing entrances. This model is not intended for outdoor sites in areas such as Al Wakrah or Mesaieed.

What wall and mounting details should we check first?

The unit weighs 15.5 kg net and 22 kg gross, and the wall-mount bracket is included. It uses a 400 × 400 mm VESA pattern, and its dimensions without the bracket are 1,222.4 mm × 694.8 mm × 58.1 mm. Book a site survey so the team can confirm wall construction, cable routes and a suitable mounting height before installation.

Is the power supply suitable for Qatar mains?

The power supply is rated 100–240 VAC at 50/60 Hz, a range that includes the 240 V, 50 Hz supply used in Qatar. Typical consumption is 100 W, with a maximum of 140 W and standby at 0.5 W or less. Your electrical contractor should still confirm the socket and circuit for each unit before installation.

We need several units for a school or ministry. How do we order?

Send the room list, mounting heights and quantity, and SmartRooms Qatar usually returns a quotation within one working day. Purchase orders (LPOs) and government tenders, including Monaqasat, are accepted, and payment can be made by bank transfer, cheque or purchase order. Each unit comes with its own wall bracket and remote control, which simplifies planning for multiple rooms.

Can I connect a laptop or media player to it?

Yes, through the single HDMI 2.1 input rated 4K at 60 Hz. This is useful for showing a live feed from a presenter's laptop in a meeting area or lecture space. The unit has no video output, so it cannot loop the signal to another display. Audio can come from the built-in 2 × 5 W speakers or the 3.5 mm audio output.