Fancyleds HDMI 2.1 Fancy Sync Box Syncing Device - 4K 120Hz HDR

In this review the Fancyleds HDMI 2.1 Fancy Sync Box is evaluated for people who want ambient LED lighting that actually follows on-screen content on large TVs. The bottom line: it is best for users with a compatible HDMI source who want smooth, low-latency color sync in 4K 120Hz or 8K 60Hz, and who value accurate HDR color transfer. Setup is commonly reported as straightforward, and the device focuses on extracting color data directly from the HDMI feed rather than using a camera, which is the single biggest reason to consider it.

Key Features

• HDMI 2.1 compatibility: Supports 4K 120Hz and 8K 60Hz plus VRR and ALLM for gaming and fast motion content with minimal lag.
• HDR and Dolby Vision pass-through: The HDMI 2.1 chip preserves HDR and DV color information so LEDs better match the picture's intended tones.
• High speed color reaction: Low latency syncing keeps lighting changes in time with action on screen for immersive gameplay and movies.
• RGBW LED support: Dedicated white diode improves white tones and produces cleaner, more natural highlights in ambient lighting.
• Universal power adaptor included: Ships with a power adaptor for US, EU, AU, and UK sockets so it works worldwide without extra buys.
• HDCP 2.3 compliant: Ensures streaming services work in higher resolutions without black screens caused by copy protection.

Who It's For

The Fancy Sync Box is aimed at TV owners with 70' to 95' displays who use an external HDMI device as their primary source, such as a game console or set-top streamer, and who want synchronized ambient lighting that takes advantage of HDR color and high frame rates. It is especially useful for gamers who use VRR and ALLM and want no perceptible delay between action and lighting.

This is not ideal for people who rely solely on apps on a smart TV, because the box only syncs content that comes through a connected HDMI device. Use with a PC is also not recommended, so those who plan to drive LEDs from a computer should look elsewhere.

Pros & Cons

Pros

• Easy to set up for most users and adds noticeable depth to TV viewing.
• Preserves HDR and Dolby Vision for more accurate LED color matching.
• Low-latency performance keeps lighting in sync during fast scenes or gameplay.
• Includes universal power adaptor so it works internationally out of the box.

Cons

• Only syncs content from a compatible HDMI device; smart TV apps are not supported.
• Some customers report mixed results with functionality and color accuracy depending on source device compatibility.

Specifications

Our Verdict

The Fancyleds HDMI 2.1 Fancy Sync Box is a strong value for viewers who use an external HDMI device and want immersive, low-latency ambient lighting that honors HDR content. It is not a universal solution for smart TV apps or PC setups, but for consoles and dedicated streamers it delivers accurate colors, high-speed syncing, and broad HDMI 2.1 feature support, making it a worthwhile upgrade for large-screen setups.

Frequently Asked Questions

Will this sync apps on my smart TV?
No. The box only syncs content passed through a connected compatible HDMI device; smart TV apps are not synced.

Does it work worldwide with different plugs?
Yes. A universal power adaptor is included to support US, EU, AU and UK power sockets.

Can I use this with my PC?
Use with a PC is not recommended; the device is designed for HDMI sources like consoles and streamers and compatibility may vary.