Optoma ZK431ST: Compact 4K UHD 4,100 Lumen Short Throw Laser Business and Education Projector

The Optoma ZK431ST makes True 4K UHD short throw projection accessible for budget-conscious education and corporate buyers. At 4,100 lumens, the ZK431ST delivers bright, vivid visuals in classrooms and conference rooms with moderate ambient light. DuraCore laser technology provides up to 30,000 hours of maintenance-free operation, eliminating the cost and disruption of lamp replacements. Four-corner correction, keystone adjustment, 360° projection capability, and Optoma Smart App compatibility make installation and alignment straightforward.

• Crisp 4K from wall to wall: Native 4K UHD (3840×2160) makes text, data, and imagery sharp and readable across screen sizes up to 300"
• Project big from tight spaces: 0.496:1 short throw lens fills the screen (30-300") from about 2-11 feet away—no more crowded rooms or presenter shadows
• Bright enough for real classrooms: 4,100 lumens keep images clear and vibrant in rooms with controlled to moderate ambient light
• No lamps. No maintenance. 30,000 hours: DuraCore laser technology means zero replacement costs and no unexpected downtime
• Install anywhere: Four-corner correction, ±15° keystone adjustment, and 360° projection flexibility handle virtually any room layout
• Smart setup from your phone: The Optoma Smart Control App guides screen alignment and gives full projector control from a mobile device

Light source

Light source type

Laser

Light source life

30,000 hours (Eco mode)

Optical

Throw ratio

0.496

Projection distance

12.99" ~ 129.92"

Zoom

n/a

Zoom type

n/a

Focal length

7.51mm

Native offset

114%

Lens shift

n/a

Connectivity

Connections- Inputs

2 x HDMI 2.0, 1 x VGA In,

Connections - Outputs

2 x USB-A 2.0, 1 x 3D sync out, 1 x Audio 3.5mm

Connections - Control

1 x RJ45, 1 x RS232, 1 x 12V trigger