ExtendBox Duo
ExtendBox Duo: Cable-Free 4K Freedom for Your Home & Space
Frustrated by tangled cables ruining your living room look, limiting where you place your TV or projector, or causing lag/dropouts during movies, games, or presentations?
ExtendBox Duo solves it all. This robust box-style wireless HDMI extender kit delivers true 4K video and audio over long distances — no cables, no mess, no compromises. Perfect for home theaters, gaming setups, multi-screen displays, conference rooms, or professional AV installs — enjoy stunning clarity and rock-solid performance without the hassle.
What You Get – Real Results
- Completely wireless freedom: Place your TV, projector, or speakers exactly where you want — no visible cables, no tripping hazards, no ugly bundles behind furniture.
- Immersive viewing every time: True 4K@60Hz with low latency for lag-free gaming, crisp movies, and smooth presentations.
- Reliable even in tough spots: Box design + anti-interference tech keeps the signal strong through walls or in crowded WiFi environments.
Why ExtendBox Duo Stands Out Unlike fragile dongle extenders that drop to 1080p or lose signal easily, ExtendBox Duo uses advanced box-style hardware for professional-grade stability and features:
- True 4K Transmission — Full 4K@60Hz HDMI 2.0 output for uncompressed, vibrant visuals (no downgrading).
- Long-Range Power — Up to 50 meters (164 ft) line-of-sight — ideal for large rooms or multi-room setups.
- One-to-Many Broadcasting — One transmitter supports up to 4 receivers — create multi-screen displays for digital signage, immersive entertainment, or conferences.
- Low Latency (~100ms) — Responsive for gaming, live video, or interactive use.
- Extra Controls — HDMI loop-out on transmitter, USB KVM for remote keyboard/mouse, IR pass-through to control source devices from afar.
- Plug-and-Play Setup — Auto-pairing, no configuration — just plug in and go.
- Universal Audio/Video — PCM passthrough for clear sound; flexible resolutions for any scenario.
Stop fighting cables and unreliable signals. Start enjoying clutter-free, high-performance AV that fits your life — beautiful setups, epic movie nights, seamless gaming, or pro presentations.
Add to Cart now and go wireless today. Risk-free with our 30-day money-back guarantee. Pair with MeetHub Kit for complete wireless AV coverage — save 10%.
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1-Year Warranty
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ExtendBox Duo
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Tired of Cable Clutter Ruining Your Home Entertainment?
ExtendBox Duo gives you true 4K wireless HDMI extension across any room — place your TV, projector, or gaming setup freely with no visible cables, no dropouts, and stunning clarity.
BEFORE
Cable Chaos
AFTER
Clean Freedom
What Cable Chaos Is Costing Your Home
- Ugly wire tangles and tripping risks ruin your living room or home theater vibe.
- Short HDMI cables force awkward furniture arrangements and limit big-screen immersion.
- Lag, pixelation, or signal drops interrupt movies, games, and family viewing moments.
- Drilling walls or hiding cables is expensive, messy, and often unreliable.
We Know the Frustration — ExtendBox Duo Makes It Effortless
We've untangled nightmare cables and watched big games glitch out. ExtendBox Duo is your simple wireless guide: true 4K long-range HDMI extension designed for real homes — stable, low-lag, and completely cable-free so you can focus on enjoyment, not tech fights.
- Crystal-clear 4K @ 60Hz visuals — enjoy sharp details in movies and games without compression artifacts.
- Long-range reliability — transmit up to 100m line-of-sight for flexible room layouts.
- Ultra-low latency — seamless gaming and sports viewing with no noticeable delay.
Go Wireless in 3 Simple Steps
Add ExtendBox Duo to Cart
Add ExtendBox Duo to Cart (or bundle with MeetHub Kit for 10% off).
Plug → Connect
Plug transmitter to your source device and receiver to your display — no tools required.
Clean Viewing
Stream flawless 4K wirelessly and enjoy the freedom.
Picture This: Pure Home Entertainment Freedom
Lag-free gaming from the couch, stunning movie nights on a perfectly placed projector, family gatherings with no distractions from wires — your space looks beautiful, feels modern, and delivers immersion every time.
Technical Specifications
Video & Audio Performance
- Wireless Transmission: Up to 4K@60Hz (HDMI 2.0 compliant)
- Output Resolution: Full 4K@60Hz (uncompressed, no downscaling)
- Flexible Resolutions: Supports lower resolutions (e.g., 1080p@60Hz, 720p) for optimized range/performance
- Latency: Approximately 100ms (low enough for smooth video viewing, presentations, and live feeds)
- Audio Support: PCM passthrough (up to 7.1 channels, depending on source)
- HDR & Color: Compatible with standard HDR10 (source-dependent); full RGB/YCbCr 4:4:4 at lower resolutions
Wireless & Range
- Technology: Advanced 802.11ac 2T2R WiFi (5GHz band for reduced interference)
- Maximum Range: Up to 100 meters (328 feet) in clear line-of-sight; real-world performance 30–70m depending on environment (walls, interference)
- Broadcasting: One transmitter to up to 4 receivers (one-to-many/multi-screen support)
- Stability Features: Built-in anti-interference technology; auto channel selection
Connectivity & Control
- Inputs (Transmitter): 1 × HDMI, 1 × USB (for KVM)
- Outputs (Transmitter): 1 × HDMI loop-out (local monitoring)
- Outputs (Receiver): 1 × HDMI
- USB KVM: Supports remote keyboard/mouse control from receiver side (USB 2.0 compatible)
- IR Back Control: Full IR passthrough (38–56kHz typical); includes IR extender/blaster for source device control from receiver location
- HDCP: Compliant (HDCP 2.2/1.4 for protected content)
Power & Physical
- Power Requirements: Transmitter: 5V/2A; Receiver: 5V/1A (adapters included)
- Build: Robust box-style design (metal/plastic enclosure for durability and heat dissipation)
- Mounting: Wall/desk mountable (brackets optional or included in some kits)
- Operating Temperature: 0°C to 40°C (32°F to 104°F)
In the Box
- 1 × Transmitter unit
- 1 × Receiver unit
- 2 × Power adapters (5V)
- 1 × IR extender/blaster cable
- 1 × HDMI cable (short for testing/setup)
- Quick start guide
30-Day Money Back Guarantee
1 Year Warranty
Secure Payments
FAQs
Please read our FAQs page to find out more.
What is ExtendBox Duo and who is it designed for?
ExtendBox Duo is a professional-grade wireless HDMI extender kit that transmits uncompressed 4K video and audio over long distances without cables. It's ideal for home theaters, conference rooms, classrooms, digital signage, multi-screen setups, and professional AV installations where reliability and range matter.
Does it support true 4K without downgrading?
Yes—full 4K@60Hz transmission and HDMI output with no compression or downscaling (unlike many basic extenders that limit to 1080p). It also supports lower resolutions for better performance over maximum range.
How does the one-to-many broadcasting work?
One transmitter can broadcast to up to 4 receivers simultaneously—perfect for displaying the same content on multiple screens (e.g., video walls, conference rooms, or multi-room home entertainment).
What is HDMI loop-out and how do I use it?
The transmitter includes a local HDMI output port—connect a nearby monitor for on-site preview, monitoring, or troubleshooting without affecting the wireless transmission.
Does it support IR remote control from the receiver side?
Yes—full IR passthrough allows you to use your original remote (for Blu-ray, cable box, media player, etc.) from the receiver location. An IR extender/blaster cable is included to attach near the source device's IR sensor.
Is setup truly plug-and-play?
Yes—auto-pairing happens in seconds. Just connect HDMI/power to both units—no apps, drivers, software, or configuration required. Ideal for quick installs or non-technical users.