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Key specs
In Stock Same-day processing on in-stock orders Available to order; contact us to confirm lead time Contact us for availability
Key specs
Same-day processing on in-stock orders. US orders arrive in 3–5 business days (AK/HI 5–7) · Expedited delivery (2–3 business days) is available for eligible items. Lead time is confirmed after you order. Contact us for availability. Tracking number emailed when your order ships. Shipping policy
Product Overview
Optoma 4K400STx Bright, True 4K UHD short throw projector for classrooms and meeting spaces Discover the short throw version of the 4K400x, for when you want a big screen in a smaller space: the Optoma 4K400STx, a cinematic projector with built-in speakers, 4K UHD and Optoma technology. Future proof your classroom or meeting room with this high brightness True 4K short throw projector.
Discover the short throw version of the 4K400x, for when you want a big screen in a smaller space: the Optoma 4K400STx, a cinematic projector with built-in speakers, 4K UHD and Optoma technology.
Future proof your classroom or meeting room with this high brightness True 4K short throw projector. The 4K400STx's bright image delivers rich visuals in any environment even when total ambient light control is not possible.
This Optoma short throw projector boasts two HDMI ports, audio connections, USB to power 5V devices, 12V trigger and an RS232 to integrate into your existing control solution.
In addition, enjoy 1080p in 240 Hz with 4.2 ms input lag when connected to a PC, making it an ideal choice for a short throw gaming projector.
Short Throw lens: lets you project an impressive 100" image from just over 3 feet (a meter) away. This allows you to place the projector closer to the wall, reducing shadows so you can present with ease.
Dual HDMI inputs: Play games, stream videos and share photos on the big screen in the comfort of your own home. With dual HDMI inputs, you can easily connect to your games console, set-top box, laptop, PC, Blu-ray player or media streamer with a single cable. You can even turn it into a smart projector by connecting an HDMI dongle like the Google Chromecast™, Amazon Fire TV, Apple TV™ or Roku® stick.
Amazing color: Optoma projectors provide reliable color performance suitable for any content and environment. From accurate sRGB colors for lifelike images to vibrant punchy presentations, we have a display mode to specifically meet your needs.
Color Management System (CMS): Display accurate lifelike colors to best match your viewing environment. This unique feature provides you with the flexibility to fine-tune the color settings for optimal precision.
ISF modes: This feature allows you to save your calibrated day and night mode settings for the best possible viewing experience.
Integrated speaker: Complete your home entertainment experience with the convenience of a powerful built-in speaker for exceptional sound quality and an easy setup, without the need for costly external speakers.
USB Power: Use the USB-A port to power an HDMI dongle, such as Google Chromecast.
Four corner correction: Adjust the keystone in both the vertical and horizontal plane. You can individually warp each corner of the image to create a perfectly square image. It's ideal for uneven walls or where projector placement is awkward and requires installation at an angle.
Backlit remote: designed using subtle white LEDs to light up the buttons, making it easy to see and operate, especially in the dark.
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Same-day processing on in-stock orders; orders placed on weekends or holidays begin processing the next business day. For US orders: Standard 3–5 business days (5–7 business days to Alaska and Hawaii). Expedited delivery (2–3 business days) is available for eligible items and is quoted after you order. Backordered and special-order items ship on confirmed lead times. Estimates are not guarantees; weather, carrier delays, and remote destinations can extend delivery times.
We accept orders only with U.S. shipping and billing addresses (the 50 states and DC). We cannot accept international, APO/FPO, or U.S. territory addresses. We ship via carriers including FedEx, UPS, and USPS. Standard ground shipping is free on all U.S. orders. Expedited shipping is available for eligible items and is quoted after you order; nothing extra is charged without your approval.
Inspect your order on arrival. If an item arrives damaged, defective, or is not what you ordered, contact us within 48 hours so we can arrange a replacement or refund at no cost to you, including return shipping. If a package arrives damaged in transit, also keep all packaging so we can file a carrier claim.
Full policy: Shipping Policy Full policy: Refund & Return Policy
Most items can be returned within 30 days of the delivery date for a refund or exchange, and every return needs an RMA number. For a full refund, items may be opened but must be unused, in original condition with all accessories and packaging, and any free promotional items must be included. Except for damaged, defective, or mis-shipped items, you pay return shipping. Items returned incomplete, used, or missing original packaging may be subject to a restocking fee of up to 15% or a partial refund. Special-order, custom-configured, and clearance/final-sale items, opened software, downloadable content, gift cards, opened consumables and personal-use items, and items missing serial numbers or manufacturer packaging can’t be returned. Any exceptions are noted on the product page.
Once we receive and inspect your return, we email you to confirm approval. Approved refunds go to your original payment method, typically within 3–5 business days of inspection, and your bank or card issuer may take an additional 5–10 business days to post the credit. Original shipping charges are non-refundable unless the item arrived damaged, defective, or was shipped in error.
A manufacturer warranty may apply to an eligible product. Coverage, term, and claim process vary by product, condition, and manufacturer, so check the product listing and manufacturer documentation for the exact term. Open-box, refurbished, used, and final-sale items may have different terms. If warranty eligibility is important to your purchase, contact us before ordering so we can confirm the information available for this item. Our support team can also help locate documentation or start an eligible claim.
We accept Visa, Mastercard, American Express, and Discover cards, PayPal, and Google Pay on supported devices and browsers; checkout shows the options available for your order and device. Purchase orders, NET 30 terms, and wire transfers are offline and by arrangement only. Call us at (800) 581-6868 (Mon–Fri 9 AM – 6 PM ET), email support@audiovideonation.com, or use Live Chat when available.
30-day returns on most items (RMA required). For a full refund, items may be opened but must be unused, in original condition with all accessories and packaging
Return policyReport it within 48 hours for a replacement or refund at no cost, including return shipping
Damaged item policy