ViewSonic LS831WU 4500 Lumens WUXGA Ultra Short Throw Projector with HV Keystoning

Lobbies, classrooms and retail walls get a 100-inch image from about 21 cm away with the ViewSonic LS831WU, a 4,500 ANSI lumen WUXGA laser projector.

It has a built-in HDBaseT receiver, IP5X sealing and 360-degree projection, and Robertson AV can quote multi-room orders.

Key Features

• Brightness: 4,500 ANSI lumens, 3,000,000:1 contrast
• WUXGA: 1920 x 1200 on a 0.48 inch DMD
• Ultra-short throw: 0.252 throw ratio; 100 inch image at 0.21 m
• Laser phosphor: Up to 20,000 hours (Normal mode)
• Connections: 2 x HDMI 2.0, HDBaseT, LAN, RS-232, computer in, 12 V trigger
• IP5X sealed engine: Dust-resistant; 360-degree projection
• Built-in sound: 2 x 10 W cube speakers

Ideal For

• Lobbies: 100 inches from 21 cm
• Classrooms: HDBaseT built in
• Retail: laser brightness

ViewSonic LS831WU 4,500 ANSI Lumen WUXGA Ultra-Short-Throw Laser Projector Specifications

ViewSonic LS831WU technical specifications, grouped by feature

Specification	Details
Picture & Optics
Projection System	0.48 in DLP (DC3 DMD)
Native Resolution	WUXGA (1920 x 1200)
Brightness	4,500 ANSI lumens
Contrast Ratio	3,000,000:1
Throw Ratio	0.252
Image Size	70 – 200 in
Throw Distance	0.06 – 0.72 m (100 in at 0.21 m)
Projection Offset	140% +/-6%
Keystone	H +/-5 degrees; V +/-5 degrees
Light Source
Light Source	Laser phosphor, up to 20,000 hours (Normal)
Connectivity & Control
Inputs	2 x HDMI 2.0 (HDCP 2.2), HDBaseT, computer in, composite, S-Video, audio in
Audio
Speakers	2 x 10 W cube
Power & Environment
Noise	36 dB (Normal); 31 dB (Eco)
Power Consumption	504 W (Normal); under 0.5 W standby
Physical
Dimensions (W x D x H)	492 x 387 x 157 mm (with adjustment foot)
Net Weight	9.9 kg
Additional Features
Control	RS-232, RJ45 (LAN)
General
Brand	ViewSonic
Model	LS831WU
UPC	766907005448

Specifications are verified against the ViewSonic manufacturer data sheet (October 2026) and may change without notice. Confirm critical requirements with ViewSonic before ordering.

What’s in the Box

• Power cord
• VGA cable
• Remote control with laser pointer
• Quick start guide

Warranty & Support

Planning a multi-room or multi-site install? Request a quote from Robertson AV for 5 or more units, or call us at 800-919-6548 or email orders@robertsonav.com. Free ground shipping on U.S. orders. Schools, businesses, government agencies and houses of worship: ask us about project and quantity pricing.

The datasheet text describes 20 W cube speakers; its specification table lists 10 W x 2.