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Dahua LPH75-ST420-S3

75 inch Smart interactive whiteboard

75-inch 4K DLED display with Zero Air Gap technology that delivers a clear image in sharp, vivid colors. Wireless screen sharing from multiple devices with an intuitive, easy-to-use system.
8 physical front buttons for quick access to functions. Smooth writing experience, and AI recognition of drawings. Quick file sharing by scanning a QR code, with easy file encryption for added privacy and security.
Switches between Android and Windows, and OPS module is optional.

Category: Uncategorized Brand: Dahua

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Specification	Details
Built-in 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 Panel
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 Ports
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 Ports	1 × Type-C 2 × HDMI IN (4K@60 Hz) 1 × VGA IN 1 × HDMI OUT (4K@60 Hz) 3 × USB Touch 2 × USB 3.2 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
Connectivity
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
Function
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
Touchscreen
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
Speaker
Built-in Speaker	2 × full-frequency speaker
Power	2.0 sound channel, front-end: 2 × 15 W / 2 × 20 W
General
Power Supply	100–240 VAC, 50/60 Hz
Power Consumption	75-inch: 150 W (typ.); 275 W (max, without OPS and Quicker Charger)
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 for top and bottom, and black for rear
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: 27 mm (1.06″); Sides: 16.5 mm (0.65″); Bottom: 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 pens 1 × HDMI cable 1 × Quick start guide 1 × Wall mount bracket (pre-installed) 1 × Accessory package 1 × Remote control 1 × Legal and Regulatory Information
Certifications	CE

Overview

Dahua LPH75-ST420-S3 – 75″ Smart Interactive Whiteboard

Elevate your classroom, meeting room, or collaborative space with the Dahua LPH75-ST420-S3, a 75-inch smart interactive display that combines powerful performance, exceptional clarity, and advanced interactivity to enhance engagement and productivity.

Key Features & Benefits

Brilliant 4K Visuals: The 75″ DLED panel with 3840×2160 resolution and Zero Air Gap technology delivers ultra-clear, vibrant, and reflection-free visuals for immersive presentations and learning sessions.
High-Performance Android System: Equipped with Android 14, a quad-core A55 processor (1.9 GHz), 8 GB RAM, and 32 GB storage for smooth multitasking and reliable performance across applications.
Enhanced Touch Precision: Infrared touch technology supports up to 21 touch points under Android and 40 under Windows, with ±1 mm accuracy and a durable surface rated ≥9H hardness for long-lasting use.
Flexible Connectivity: Offers multiple front and rear ports including USB-C, HDMI in/out, VGA, RJ-45, and RS-232. Supports Wi-Fi 6 and Bluetooth 5.x for seamless wireless integration. Optional OPS slot adds Windows compatibility.
Wireless Collaboration: Enables multi-device screen sharing with up to 9 split-screen displays and reverse control, allowing effortless teamwork and interactive sessions.
Built-In Smart Controls & Audio: Features 2 full-range speakers and 8 physical shortcut buttons for functions like whiteboard, volume, source, home, and lock, ensuring quick and easy operation.
Durable Design: Built with anti-dazzle 4 mm tempered glass, a sturdy metal frame, and a long lifespan of around 50,000 hours. Typical brightness of 400 cd/m² with power consumption around 150 W.
Dual-System Flexibility: Easily switch between Android and Windows systems via the OPS module, providing a versatile platform for both educational and professional applications.

Why Choose the LPH75-ST420-S3
The Dahua LPH75-ST420-S3 is designed to transform how teams and students interact. Its large, high-resolution display and advanced touch technology make it ideal for fostering collaboration, creativity, and real-time communication in both classrooms and corporate settings.

Ideal For: