Roku Express 4K HDR Media Streamer (3940EU)

The Roku Express 4K HDR Media Streamer (3940EU) is a compact and affordable streaming device designed to deliver brilliant 4K Ultra HD and HDR entertainment. Built with a powerful Realtek quad-core processor and 1 GB RAM, this streaming box offers smooth navigation, fast app launches, and vibrant picture quality at up to 60fps. With dual-band Wi-Fi, a simple customizable home screen, and access to thousands of streaming channels, the Roku Express 4K makes upgrading your TV to Ultra HD streaming simple and cost-effective.

Product Features

Brilliant 4K Ultra HD and HDR Streaming

Enjoy stunning 4K Ultra HD (3840 x 2160) resolution at up to 60fps with support for HDR10, HDR10+, and HLG. The device also upscales 720p and 1080p content to near-4K quality for sharper visuals and enhanced clarity.

Fast and Responsive Performance

Powered by a Realtek 1315 quad-core processor and 1 GB of RAM, the Roku Express 4K delivers smooth streaming performance and quicker responsiveness compared to standard HD streaming devices.

Dual-Band Wi-Fi Connectivity

Equipped with 802.11ac dual-band Wi-Fi (2.4 GHz and 5 GHz) for stable and reliable streaming. Ethernet connectivity is supported via an optional USB adapter for users who prefer a wired connection.

Simple Customizable Home Screen

The Roku OS features an intuitive interface that allows you to place your favorite channels front and center for faster access and easier navigation.

Massive Streaming Channel Selection

Access thousands of free, live, and premium channels, including popular services such as Netflix, Disney+, Hulu, and Amazon Prime Video. Stream live programming and explore over 250 live channels available through The Roku Channel.

Simple IR Remote Control

Includes a standard infrared remote that requires a direct line of sight to the device for operation. The compact design ensures easy placement for reliable remote performance.

Smart Home Compatibility

Works seamlessly with Apple AirPlay, Apple HomeKit, Amazon Alexa, and Google Assistant for convenient voice control and smart home integration.

Private Listening via Mobile App

Use the Roku mobile app to enable private listening through headphones connected to your smartphone, along with voice search and easy text entry.

Easy Installation and Mounting

Setup is quick and straightforward using the included high-speed HDMI cable. A removable adhesive strip allows you to mount the device discreetly to your TV for optimal remote line-of-sight.

Product Specifications

• Brand: Roku
• Model: 3940EU
• Product Type: 4K HDR Streaming Media Player
• Processor: Realtek 1315 Quad-Core
• Memory: 1 GB RAM
• Maximum Resolution: 4K Ultra HD (3840 x 2160) at 60fps
• Supported Resolutions: 720p, 1080p, 4K UHD (with upscaling)
• HDR Support: HDR10, HDR10+, HLG
• Dolby Vision Support: Not supported
• Wireless Connectivity: 802.11ac dual-band Wi-Fi (2.4 GHz and 5 GHz)
• Wired Connectivity: Supported via optional USB Ethernet adapter
• Ports: HDMI output, Micro-USB (power/Ethernet adapter), Reset button
• Audio Support: Digital stereo over HDMI, DTS Digital Surround pass-through, Dolby Audio pass-through, Dolby Atmos pass-through
• Dimensions: 0.8 x 3.4 x 1.5 inches (20.8 x 86.3 x 39.3 mm)
• Weight: 1.6 oz (approx.)
• Power Consumption: Approximately 2.5W while streaming
• Power Input: 5V – 1A
• Remote Type: Standard IR remote
• Operating System: Roku OS
• Included Accessories: High-speed HDMI cable, power cable, power adapter, adhesive mounting strip
• Condition: Brand New