Roku Express 4K HDR Media Streamer (3940EU)

The Roku Express 4K HDR Media Streamer (3940EU) is an entry-level 4K streaming device designed to upgrade any HDMI-enabled TV into a smart entertainment hub. Built for affordability and ease of use, it delivers smooth 4K Ultra HD playback with HDR10 and HDR10+ support, improving brightness, contrast, and overall picture quality. This European/UK variant of the Roku Express 4K combines reliable performance with wide streaming app compatibility, making it a practical choice for users looking to upgrade from standard HD viewing without investing in premium hardware.

Product Features

4K Ultra HD Streaming with HDR10+ Support

The Roku Express 4K supports up to 4K Ultra HD resolution at 60fps, delivering sharp and detailed visuals. HDR10, HDR10+, and HLG support enhance color depth and contrast, creating a more vibrant and immersive viewing experience on compatible TVs.

Smooth Quad-Core Performance

Powered by a quad-core processor and 1 GB RAM, the device provides responsive navigation and stable streaming performance. It handles multitasking efficiently, ensuring smooth playback even when multiple apps are used on the network.

Dual-Band Wi-Fi for Stable Streaming

With 802.11ac dual-band Wi-Fi (2.4 GHz and 5 GHz), the device offers improved connection stability and reduced buffering compared to single-band streaming devices. This ensures consistent 4K streaming quality in most home environments.

Wide Streaming App Compatibility

The Roku platform provides access to thousands of streaming channels, including global services like Netflix, Disney+, and Prime Video, as well as regional apps such as BBC iPlayer and ITV Hub, offering a complete entertainment ecosystem.

Simple IR Remote with Shortcut Buttons

The included IR remote features dedicated shortcut buttons for popular streaming services, allowing quick access to apps. It operates via line-of-sight for straightforward and reliable control.

Smart Home and Voice Assistant Integration

The Roku Express 4K works with Amazon Alexa, Google Assistant, Apple HomeKit, and Apple AirPlay 2, enabling voice control, screen mirroring, and smart home integration through compatible devices.

Compact Plug-and-Play Design

Designed for simplicity, the device connects directly to your TV via HDMI and is powered through Micro-USB. It can also be powered by a TV USB port, making installation quick and cable management minimal.

Dolby Atmos and DTS Audio Support

The device supports DTS Digital Surround and Dolby Atmos passthrough via HDMI, delivering enhanced audio performance when paired with compatible sound systems or AV receivers.

Product Specifications

• Product Name: Roku Express 4K HDR Media Streamer
• Model Number: 3940EU
• Processor: Quad-core ARM processor
• RAM: 1 GB
• Internal Storage: 512 MB (system and channel data)
• Operating System: Roku OS with automatic updates
• Maximum Resolution: 4K Ultra HD (3840 × 2160) at 60fps
• HDR Support: HDR10, HDR10+, HLG
• Video Codecs: H.264 (AVC), H.265 (HEVC)
• Upscaling: 720p and 1080p content upscaled to 4K
• HDMI Output: HDMI 2.0b (HDCP 2.2 compliant)
• Wireless Connectivity: Dual-band Wi-Fi (802.11ac, 2.4 GHz / 5 GHz)
• Power Input: 5V / 1A via Micro-USB
• Power Consumption: <3.5W during streaming, ~1.5W in sleep mode
• Audio Support: Dolby Atmos passthrough, Dolby Audio, DTS Digital Surround
• Remote Type: Simple IR remote with shortcut buttons (line-of-sight required)
• Smart Home Compatibility: Apple AirPlay 2, HomeKit, Amazon Alexa, Google Assistant
• Dimensions: 86.3 × 39.3 × 20.8 mm
• Weight: 44.6 g
• EAN/UPC: 8296100046938