Optoma 4K400STX

Overview

The Optoma 4K400STX is a 4K UHD short-throw projector designed to deliver bright and clear images with 4000 lumens of brightness, making it suitable for living rooms, classrooms, and boardrooms. It supports native 4K resolution (3840 x 2160) and HDR10 and HLG formats, which enhance contrast and color accuracy for lifelike visuals. This projector performs well even in environments with ambient light, ensuring your presentations, movies, or games remain vivid and easy to see.

With dual HDMI ports, a VGA input, and a powered USB port, it offers flexible connectivity for gaming consoles, laptops, and streaming devices. The 1080p gaming mode with a 240Hz refresh rate and 4.2ms response time provides smooth and responsive gameplay. Image alignment is simplified through keystone and four-corner correction, supporting screen sizes up to 300 inches.

Key features

• 4000-lumen brightness that maintains clear images in well-lit rooms
• Native 4K UHD resolution for sharp and detailed visuals
• Supports HDR10 and HLG to improve contrast and color depth for more realistic images
• 1080p gaming mode with 240Hz refresh rate and 4.2ms response time for smooth gameplay with minimal lag
• Keystone and four-corner correction features to easily achieve a perfectly aligned picture
• Dual HDMI and VGA inputs allow connection to multiple devices without switching cables
• Powered USB-A port to charge devices or power accessories during use
• Built-in ISF modes to save calibrated settings and maintain consistent image quality in different lighting conditions
• Backlit remote control for convenient operation even in dark environments

Key specs

• Brightness: 4000 lumens
• Resolution: 4K UHD (3840 x 2160)
• Refresh rate (gaming mode): 240Hz at 1080p
• Response time (gaming mode): 4.2 milliseconds
• Projection size: up to 300 inches
• Inputs: 2x HDMI, 1x VGA, 1x USB-A (powered)
• Supported HDR formats: HDR10, HLG

Connectivity and compatibility

This projector offers versatile connectivity options to fit a wide range of devices. Dual HDMI ports allow you to connect gaming consoles, Blu-ray players, or streaming devices simultaneously. The VGA input supports older laptops or desktop computers, while the powered USB-A port can charge compatible devices or power accessories like streaming sticks. These options make it easy to switch between sources without unplugging cables, supporting both modern and legacy equipment.

Performance and reliability

The 4K400STX delivers consistent performance with its high brightness and native 4K resolution, ensuring images stay clear and detailed even in rooms with ambient light. The inclusion of HDR10 and HLG formats enhances color accuracy and contrast, making visuals more immersive. For gamers, the fast refresh rate and low response time reduce motion blur and input lag, providing a responsive experience. The projector’s image correction features help maintain a perfectly aligned picture, while ISF modes allow you to save and recall calibrated settings for reliable image quality over time.

Ideal uses and environments

This projector fits well in environments where both image quality and ease of use are important. It works well in home theaters, classrooms, and professional meeting rooms where bright and detailed visuals are needed. Gamers will appreciate the smooth performance in 1080p mode, while educators and presenters benefit from the large projection size and flexible connectivity. Its ability to perform in ambient light makes it a strong choice for spaces that cannot be fully darkened.

Orders are processed within 2 business days, which includes verification, packing, and dispatch. Shipping costs are calculated at checkout based on destination, total weight, and selected speed. Free shipping applies to carts over $100 (excluding heavyweight items). All available options and final pricing are clearly shown before payment so you can choose the service that best fits your needs.

Deliveries are handled by major carriers such as USPS, UPS, and FedEx. Estimated delivery times are displayed at checkout and may vary depending on service level and location. Please note that these are estimates and can be affected by weather, holidays, or carrier volume. Once your order ships, you’ll receive a tracking number for real-time updates from pickup to final delivery.

Providing an accurate shipping address helps prevent delays, and changes may be limited once the order has been dispatched. P.O. boxes are supported only when permitted by the selected carrier. Packaging and handoff are optimized to protect items during transit, though oversized or high-weight products may require special handling. All shipping methods and any related constraints are clearly shown during checkout.

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Returns are accepted within 30 days of delivery. Items must be unused, in the same condition received, with tags, manuals, accessories, and original, unaltered packaging. Any item kept will be deducted from the refund. Start a return by sending us an email. Items sent back without approval may be refused or returned to the sender.

Some items are not returnable: opened TVs/combos/monitors 37″+, opened computers or software, electronic downloads, opened consumables (film, paper, bulbs, media, ink), custom or modified computers, special-order or “nonreturnable” items, submerged underwater gear, and opened educational media.

After inspection, refunds are issued to the original payment method; allow 5–7 business days for the credit to post. Shipping, handling, customs duties, and import taxes are nonrefundable. If an item is used, incomplete, or not in original condition, a 30% restocking fee may apply. Direct exchanges are not offered; purchase the replacement and return the original for a refund.

We act solely as a reseller. Any product warranty is provided and administered by the manufacturer, not by our store. That means eligibility, coverage, and outcomes are determined by the manufacturer’s policy for each brand and model. Before purchasing, we recommend reviewing the warranty terms on the manufacturer’s website or in the product documentation to confirm what is covered and for how long.

If you need warranty service, please file the claim directly with the manufacturer. They may require proof of purchase, the product serial number, original packaging, photos, or basic troubleshooting. Some brands ask you to register the product or obtain a case number before shipping it for repair or replacement. We don’t submit or approve claims, but we can point you to the correct support links and contact details.

Keep your invoice and packaging in a safe place, and report any functional issues to the manufacturer as soon as they appear. If you’re unsure whether a problem is covered, the manufacturer’s support team can confirm next steps and timelines. While we cannot intervene in decisions or outcomes, we’re happy to provide purchase documentation or guidance so you can move through the warranty process smoothly.

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