Dahua LPH75-ST420-S3 · Price in Qatar

Name: Dahua LPH75-ST420-S3 75-inch Smart Interactive Whiteboard
Brand: Dahua
SKU: dahua-lph75-st420-s3
Availability: InStock

Overview

The Dahua LPH75-ST420-S3 is a 75-inch 4K interactive whiteboard from its ST420-S3 education series, with a 3840 × 2160 panel, 400 cd/m² typical brightness and infrared touch supporting 21 points on Android. It runs Android 14 with 8 GB RAM and 32 GB storage, includes Wi-Fi 6 and dual 20 W speakers, and suits classrooms, training rooms and seminar spaces across Qatar. Request a quote from SmartRooms Qatar.

A 75-inch 4K panel built for shared teaching spaces

The Dahua LPH75-ST420-S3 is a 75-inch interactive whiteboard from the ST420-S3 education series, built on a 16:9 LCD panel with 3840 × 2160 resolution. A DLED backlight gives a typical brightness of 400 cd/m², and the 10-bit panel shows 1.07 billion colours at a 60 Hz refresh rate. Viewing angles of 178 degrees horizontally and vertically mean students seated at the sides can read the same content as those at the front.

The 4 mm anti-dazzle tempered glass reduces reflections from windows and ceiling lights, which matters in rooms with large glazing. The frame measures 27 mm at the top, 16.5 mm on the sides and 68 mm at the bottom.

Touch, Android 14 and drawing tools in one board

Touch uses infrared technology with a zero air gap attachment and a surface hardness of 9H or more. It accepts finger and stylus input, supports 21 touch points on Android and 40 points with Windows, and comes with two passive stylus pens. The board runs Android 14 on a quad-core A55 processor at 1.9 GHz, with 8 GB RAM and 32 GB storage, so lessons can run without a separate computer. AI-based drawing recognition and QR code file sharing let teachers move material to students' own devices quickly.

Connections and wireless options to check

Front: HDMI IN, a Type-C port carrying DisplayPort at 4K@60 fps with USB touch and 65 W power delivery, two USB 3.2 Gen1 Type-A ports and a 3.5 mm microphone input.
Rear: two HDMI IN ports at 4K@60 Hz, one HDMI OUT, a VGA input, RS-232 on a DB9 port, two RJ-45 ports, three USB touch ports, S/PDIF and line-out audio, and one OPS slot.
Wireless: Wi-Fi 6 on 2.4 GHz and 5 GHz, Bluetooth 5.3 and NFC card swiping.

Where it fits in Qatar

A 75-inch board suits a mid-sized classroom in Al Sadd or Al Rayyan, a seminar room at a private school, or a training room at Education City. In a boardroom in West Bay or The Pearl, it can serve as the main display for presentations and video calls run from a laptop. Hotels and serviced apartments in Lusail may choose it for meeting rooms that need a large, touch-capable screen.

What to plan before ordering

The board weighs 49.0 kg net and 60.5 kg gross, so the wall and its fixings must be checked for load before fitting. The wall mount bracket comes pre-installed, the mounting hole spacing is 600 × 400 mm, and a mobile bracket is also supported. SmartRooms Qatar offers free site surveys before wall-mounting a panel of this size. Plan for 150 W typical and 275 W maximum without an OPS module. The operating range is 0 to +40 °C, so the board belongs in air-conditioned indoor rooms away from direct sun, since Qatar summer temperatures exceed 45 °C.

Schools and government offices can order by purchase order (LPO) or through tenders, including Monaqasat. Request a quote from SmartRooms Qatar, and the team will usually send a quotation within one working day and can advise on professional installation.

Highlights

75-inch panel at 3840 × 2160 resolution with DLED backlight
Typical brightness of 400 cd/m² and 178-degree viewing angles
Infrared touch with 21 points on Android, finger and stylus
Android 14 with 8 GB RAM and 32 GB storage
Wi-Fi 6, Bluetooth 5.3 and NFC card swiping
Two 20 W speakers and one rear OPS slot

Classroom fit

At 75″ the farthest student should sit within about 5.6 m (6× the screen height).

Estimated timeline

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

Specifications

68 specifications · Source: manufacturer · checked Oct 2026

Built-in System6

Operating System: Android 14
CPU: Quad-core A55
CPU Frequency: 1.9 GHz
GPU: ARM Mali-G52 MP2 (2EE)
RAM: 8 GB
ROM: 32 GB

LCD Panel11

Panel Dimensions: 75 inch
Backlight: DLED
Aspect Ratio: 16:9
Brightness: 400 cd/m² (typ.)
Static Contrast: VA: 4000; IPS: 1200
Resolution: 3840 (H) × 2160 (V)
Viewing Angle: 178° (H); 178° (V)
Lifespan: 50,000 hrs
Display Color: 1.07 Billion colors (10 Bit)
Response Time: 8 ms (typ.)
Refresh Rate: 60 Hz

Device Ports15

Light Sensor: Yes
Front Button: 8 buttons: Whiteboard, volume, curtain, touch lock, signal source, navigation bar, homepage, power supply
Front Ports: 1 × Type -C 1 × HDMI IN 1 × USB Touch 2 × USB 3.2 Gen1 Type-A 1 × 3.5 mm Mic in 1 × Type-C (DP IN (4K@60 fps) + USB 3.0 Host+USB 2.0 device (touch) + PD 65 W); supports wired network sharing
Rear Port: 1 × Type -C 2 × HDMI IN (4K@60 Hz) 1 × VGA IN 1 × HDMI OUT (4K@60 Hz) 3 × USB Touch 2 × USB3.2 Gen1 Type-A Audio In: 1 × 3.5 mm Line In Audio Out: 1 × SPDIF and 1 × 3.5 mm Line out RS-232: 1 × DB9 port Micro: 1 × USB 2 × RJ-45 1 × OPS slot
Wi-Fi: Yes
Wi-Fi Standard: 802.11b/g/n/a/ac/ax
Wi-Fi Frequency Range: 2.4 GHz/5 GHz
MAX Power Transmission (Wi-Fi): CE EIRP: ≤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
Bluetooth: Yes
Bluetooth Standard: EDR, BT2.1/4.2/5.2/5.3
Bluetooth Frequency Range: 2400–2483.5 MHz
MAX Power Transmission (Bluetooth): CE EIRP: ≤20 dBm@2400–2483.5 MHz;
RFID Modulation Method: ASK
RFID Frequency Range: 13.56 MHz
MAX Power Transmission (RFID): 42 dBuA/m @10 m

Function3

IR Receiver: 1
Card Swiping with NFC: Yes
Wireless Access Point: WIFI 5, 2.4 GHz/5 GHz; Supports enabling Hotsport and WIFi at the same time₩Wi-Fi 6, 2.4 GHz/5 GHz, supports 802.11 a/b/g/n/ac/ax

Touchscreen12

Response Time: ＜10 ms
Touch Technology: Infrared
Attachment Method: Zero Air Gap
Touch Points: 21 points for Android, and 40 points for Windows
Touch Accuracy: ±1 mm (0.04")
Valid Touch: 2 mm (0.08")
Touch Height: 3 mm (0.12")
Writing Mode: Finger and stylus pen
Communication Mode: USB
Anti-light Interference: Anti-dazzle
Surface Hardness: ≥9 H
Touch Resolution: 32,767 × 32,767

Speaker2

Built-in Speaker: 2 × full-frequency speaker
Power: 2.0 sound channel, front-end: 2 × 15 W₩2.0 sound channel, front-end: 2 × 20 W

General18

Power Supply: 100–240 VAC, 50/60 Hz
Power Consumption: 75-inch: 150 W (typ.); 275 W (max, without OPS and Quicker Changer）
Standby Power Consumption: ≤0.5 W
Operating Temperature: 0 °C to +40 °C (+32 °F to +104 °F)
Storage Temperature: –10 °C to +50 °C (+14 °F to +122 °F)
Operating Humidity: 10%–90% (RH)
Storage Humidity: 10%–90% (RH)
Product Material: Metal
Glass: 4 mm anti-dazzle tempered glass
Casing Color (Frame/Rear): Black frame for left and right, silver frame for top and bottom and black frame for back
Product Dimensions: 1,707.5 mm × 121.3 mm × 1,050.0 mm (67.23" × 4.48" × 41.34") (L × W × H)
Frame Size: Top frame: 27 mm (1.06"); Left and right frame: 16.5 mm (0.65"); Bottom frame: 68 mm (2.68")
Packaging Dimensions: 1,790.0 mm × 200.0 mm × 1,165.0 mm (70.47" × 7.87" × 45.87") (L × W × H)
Net Weight: 49.0 kg (108.03 lb)
Gross Weight: 60.5 kg (133.38 lb)
Holes Distance: 600 mm × 400 mm (23.62" × 15.75")
Installation: Wall mount or mobile bracket
Packing List: 1 × Smart interactive whiteboard; 1 × Power cord; 2 × Passive stylus pen; 1 × HDMI cabe; 1 × Quick start guide; 1 × Wall mount bracket (already installed on the whiteboard); 1 × Accessory package; 1 × Remote control; 1 × Legal and Regulatory Information

Certification1

Certifications: CE

Downloads

7 files from the manufacturer

PDF Datasheets LPH75-ST420-S3_S3_datasheet_20240918.pdf 2.8 MB PDF Manuals & guides Dahua Smart Interactive Whiteboard_Quick Start Guide_V1.0.1.pdf 1.9 MB PDF Manuals & guides Dahua Smart Interactive Whiteboard_User's Manual_V1.0.2.pdf 8.2 MB PDF Manuals & guides LPH75-ST420-S3_INSTALLATION_METHOD_EN.pdf 50 KB PDF Drawings & CAD LPH75-ST420-S3_DIMENSIONS.pdf 1.8 MB PDF Drawings & CAD LPH75-ST420-S3_PORT.pdf 165 KB 2601 Software & firmware · Opens on manufacturer site DHI_DahuaDeepHubLiteBasicS3_MultiLang_V3.012.0000000.1.R.260119

Questions about LPH75-ST420-S3

Who is the Dahua LPH75-ST420-S3 designed for?

It suits schools, universities and training centres that need one large interactive display for a mid-sized room. Examples include a classroom in Al Sadd or Al Rayyan, a training room at Education City or a seminar room in a private school. The 75-inch 16:9 panel gives a wide writing area. For a lecture hall with many rows of seats, a larger panel is usually a better match.

What are the main display specifications?

The LCD panel has a 3840 × 2160 resolution, a typical brightness of 400 cd/m², a DLED backlight and a 60 Hz refresh rate. It shows 1.07 billion colours at 10-bit depth, with 178-degree horizontal and vertical viewing angles. The 4 mm anti-dazzle tempered glass is designed to reduce reflections from windows and ceiling lights in bright rooms.

How does the touchscreen work and how many touch points does it support?

The screen uses infrared touch with a zero air gap attachment and a surface hardness of 9H or more. It supports 21 touch points on Android and 40 points when used with Windows. Finger and stylus input both work, and two passive stylus pens are included in the box. Touch accuracy is within ±1 mm, which helps with fine handwriting in lessons.

Which operating system and hardware does the board run?

The board runs Android 14 on a quad-core A55 processor at 1.9 GHz, with an ARM Mali-G52 MP2 graphics unit, 8 GB RAM and 32 GB storage. Because the system is built in, teachers can open apps and annotate content without connecting a separate computer. Check the storage against the apps and files you plan to keep on the board.

Which ports do I use to connect a laptop?

The front Type-C port accepts DisplayPort at 4K@60 fps, USB 3.0 host and touch, and 65 W power delivery, so one cable can carry video and charge a compatible laptop. There is also a front HDMI IN, and the rear adds two HDMI IN ports at 4K@60 Hz plus a VGA input for older equipment.

Does it include Wi-Fi, Bluetooth and NFC?

Yes. It has Wi-Fi 6 (802.11 a/b/g/n/ac/ax) on 2.4 GHz and 5 GHz, Bluetooth 5.3 and NFC card swiping. The wireless access point function can run hotspot and Wi-Fi at the same time. QR code sharing lets a user scan a code on the board and receive a file on their own device, and wired network sharing is available through the front Type-C port.

Can it be wall-mounted in a boardroom in West Bay?

Yes. The wall mount bracket comes pre-installed, and the mounting hole distance is 600 × 400 mm. A mobile bracket is also supported. The board weighs 49.0 kg net and 60.5 kg gross, so the wall must be checked for load and fixings before installation. SmartRooms Qatar offers free site surveys for this purpose and can advise on professional installation.

Can it be placed near a window or in a room that heats up in summer?

The operating range is 0 to +40 °C with 10% to 90% relative humidity, so the board should be used in air-conditioned indoor rooms. Qatar summer temperatures can exceed 45 °C, so keep the board away from direct sunlight, hot corridors and dust-prone entrances. If a location falls outside these conditions, ask the SmartRooms Qatar team to review it before ordering.

What power supply and consumption does it need?

The power supply accepts 100 to 240 VAC at 50 or 60 Hz, a range that includes Qatar's 240 V, 50 Hz mains. Typical consumption is 150 W, with a maximum of 275 W excluding an OPS module, and standby draw is 0.5 W or less. Ask the team to confirm that the supplied power cord suits the socket type at your site before the unit arrives.

What is the OPS slot for, and how does it affect power?

The rear OPS slot takes an OPS-standard computer module, which adds a second computing option beside the built-in Android system. The 275 W maximum figure excludes an OPS module, so the power draw of the module you choose must be checked separately. SmartRooms Qatar can advise on compatibility before you order.

How would a school or government office order several units?

Orders can be placed by purchase order (LPO) or through government tenders, including Monaqasat. Payment is by bank transfer, cheque or purchase order. Send the quantity and a list of target rooms, and the team usually returns a quotation within one working day. Products are covered by the manufacturer's warranty, and a site survey helps confirm wall and power positions for each classroom.