Roku Streaming Stick 4K+ (3821R)

The Roku Streaming Stick 4K+ (3821R) is a premium 4K streaming device designed to deliver high-performance entertainment with enhanced speed, stability, and convenience. Released in 2021, it combines the powerful streaming capabilities of the Roku Streaming Stick 4K with the advanced Roku Voice Remote Pro. It supports 4K Ultra HD resolution with full HDR compatibility, including Dolby Vision and HDR10+, making it ideal for users who want a cinema-like viewing experience in a compact, hidden device that plugs directly into the TV.

Product Features

4K Ultra HD Streaming with Dolby Vision HDR

The Roku Streaming Stick 4K+ delivers smooth 4K Ultra HD playback at up to 60fps. With support for Dolby Vision, HDR10+, HDR10, and HLG, it enhances brightness, contrast, and color depth for a more realistic and immersive viewing experience.

Long-Range Wi-Fi for Stable Streaming

The device features a redesigned long-range Wi-Fi receiver integrated into the power cable. This improves signal strength and reduces buffering, especially in rooms far from the router or in crowded network environments.

Fast Quad-Core Performance

Powered by a quad-core ARM Cortex A55 processor with 1 GB RAM, the device ensures fast navigation, quick app launches, and smooth multitasking. It is optimized for responsive streaming performance across major apps and platforms.

Hidden Plug-In Stick Design

Designed as a compact streaming stick, the device plugs directly into the HDMI port and remains hidden behind the TV. This helps maintain a clean, cable-free setup, especially for wall-mounted televisions.

Roku Voice Remote Pro with Advanced Controls

The included Roku Voice Remote Pro features rechargeable USB power, hands-free voice control (“Hey Roku”), and a built-in lost remote finder. It also includes programmable shortcut buttons for quick access to favorite apps and commands.

Private Listening with Mobile App and Remote Jack

Users can enjoy private listening either through the Roku mobile app or via the remote’s 3.5mm headphone jack. This allows for personalized audio without disturbing others in shared spaces.

Smart Home and Casting Integration

The device supports Apple AirPlay 2, Apple HomeKit, Amazon Alexa, and Google Assistant. This enables voice control, screen mirroring, and seamless integration with smart home ecosystems.

Immersive Audio Support

The Roku Streaming Stick 4K+ supports Dolby Atmos passthrough, DTS Digital Surround, and digital stereo over HDMI. This delivers rich, theater-like sound when connected to compatible audio systems.

Product Specifications

• Product Name: Roku Streaming Stick 4K+
• Model Number: 3821R
• Processor: Quad-core ARM Cortex A55
• RAM: 1 GB
• Internal Storage: 4 GB
• Operating System: Roku OS with automatic updates
• Maximum Resolution: 4K Ultra HD (3840 × 2160) at 60fps
• HDR Support: Dolby Vision, HDR10+, HDR10, HLG
• Video Codecs: H.264 (AVC), H.265 (HEVC)
• HDMI Output: HDMI 2.0b (HDCP 2.2 support required)
• Wireless Connectivity: Dual-band Wi-Fi (802.11ac, MIMO)
• Wi-Fi Range: Long-range receiver integrated into USB power cable
• Power Input: 5V / 1A via Micro-USB
• Power Consumption: Less than 3.5W during 4K streaming
• Audio Support: Dolby Atmos passthrough, DTS Digital Surround, digital stereo
• Remote Type: Roku Voice Remote Pro (rechargeable, hands-free voice, programmable buttons, headphone jack, remote finder)
• Smart Home Compatibility: Apple AirPlay 2, HomeKit, Amazon Alexa, Google Assistant
• Dimensions: 94 × 21 × 11 mm (3.7 × 0.8 × 0.5 inches)
• Weight: 26 g