UGOOS has officially launched the SK4 Pro, an upgraded variant of its compact SK4 Android TV box. While it retains the exact same footprint as its predecessor, the Pro model swaps out the standard Amlogic S905X5M-J chipset for the more capable S905X5M-K variant.
That single letter change fixes the base model's most glaring omission: Widevine L1 DRM certification, alongside native support for DTS audio and Dolby Atmos.
The SK4 Pro is available now on the official UGOOS store for €139.99—a $25 premium over the standard SK4 (€114.99). Visually, you can spot the Pro by its dark green top panel, which replaces the original’s purple cover.
| Feature / Spec | UGOOS SK4 Pro | UGOOS SK4 (Standard) |
| Processor (SoC) | Amlogic S905X5M-K | Amlogic S905X5M-J |
| DRM Certification | Widevine L1 (HD/4K Streaming) | Widevine L3 (SD Streaming Only) |
| Audio Licenses | Dolby Audio + Dolby Atmos + DTS | Dolby Audio (No Atmos, No DTS) |
| Video HDR | Dolby Vision, HDR10, HDR10+, HLG | Dolby Vision, HDR10, HDR10+, HLG |
| Top Panel Color | Dark Green | Purple |
| Price | €139.99 | €114.99 |
What remains identical: Quad-core Cortex-A55 CPU, Mali G310 V2 GPU, 4GB LPDDR4 RAM, 64GB eMMC storage, Wi-Fi 6 (2T2R), Bluetooth 5.4, 100M Ethernet, HDMI 2.1b (4K@60fps), 1x USB 2.0, 1x USB Type-C, S/PDIF optical, and Android 14 AOSP.
Why the "-K" Chipset Matters for Streaming Enthusiasts
The standard SK4 was a tough sell for mainstream users due to its Widevine L3 limitation. The SK4 Pro aims to rectify that by adding three critical certified licenses:
Widevine L1 Certification: This is the big one. Without L1, major streaming services like Netflix, Disney+, and Amazon Prime Video cap playback at a muddy 480p or 720p. The Pro model unlocks full HD and 4K hardware-level decryption for DRM-protected platforms.
DTS Audio Support: Essential for home theater purists. If you have a local media library full of DTS-encoded files or a soundbar that relies on DTS decoding, the Pro model offers native processing and passthrough. The standard model simply goes silent or forces a stereo downmix.
Dolby Atmos: Adds object-based spatial audio to your setup. Combined with the inherited Dolby Vision, HDR10+, and HLG support, the Pro model finally covers the complete premium AV format bingo card.
Video decoding performance remains identical across both models. The S905X5M platform easily handles AV1, VP9, H.265, and H.264 at up to 4K@60fps, complete with AI Super Resolution upscaling to boost lower-res content to near-4K quality.
Software: Power-User Paradise (Android 14 AOSP)
Unlike standard streaming sticks that run the locked-down Google TV interface, the SK4 Pro runs Android 14 AOSP (Android Open Source Project). This means you get a highly customizable desktop-style environment with unrestricted sideloading, launcher options, and system-level control.
UGOOS packs in its signature suite of advanced settings, making this a dream for power users:
Built-in Samba server for painless network file sharing
Native NFS and CIFS client support
One-click Superuser (root) access
Granular remote control button mapping and power management
System-wide hardware monitoring overlays
The box includes a high-quality Bluetooth 5.4 voice remote equipped with an air-mouse gyroscope for easier navigation through non-TV-optimized apps.
The Catch: Fast Ethernet and USB 2.0 Retained
While the internal upgrades are excellent, UGOOS kept the exact same chassis and port selection—meaning the standard model's biggest hardware bottlenecks remain.
The most notable drawback is the 100Mbps Fast Ethernet port. While Wi-Fi 6 (2T2R MIMO) offers plenty of bandwidth for wireless 4K streaming, users looking to hardwire the device to stream massive, uncompressed 4K Blu-ray rips from a local NAS may run into a bandwidth bottleneck. Additionally, the single USB-A port is stuck at USB 2.0 speeds, which limits data transfer rates for connected external hard drives.
The Verdict: Is the €25 Premium Worth It?
The value of the UGOOS SK4 Pro depends entirely on what you watch and how you watch it.
Buy the SK4 Pro (€139.99) if this is going to be your primary living room media hub. If you pay for Netflix, Disney+, or Prime Video and want them in glorious 4K, or if you have a dedicated audio receiver that utilizes Dolby Atmos and DTS, the extra $25 is mandatory.
Stick to the Standard SK4 (€114.99) if you are building an IPTV-only box, a dedicated YouTube machine, or a casual bedroom setup. For those specific use cases, the Widevine L3 limitation doesn't matter, and the core processing power is identical.
Buyer's Tip: Make sure to purchase directly from the official UGOOS store. Third-party resellers and AliExpress listings frequently list these boxes with heavily inflated price tags.
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