Kramer EXT3-21-XR-TR 2x1 4K60 HDMI/USB Switcher Extender Over 100m HDBaseT 3.0
- Enables seamless AV and USB switching for collaborative in-room and online meetings
- Simultaneously switches AV and USB host inputs for smooth content sharing
- Extends high-quality signals over twisted-pair copper cabling
- Works with any HDBaseT-compliant extension device
- Delivers long-reach, reliable transmission with recommended Kramer cables

The EXT3-21-XR-TR is a high-performance, extended-reach HDBaseT 3.0 extender for 4K60Hz (4:4:4) HDMI, USB, Ethernet, RS-232, and IR signals over twisted pair, flexibly set as transmitter-side or receiver-side device. EXT3-21-XR-TR transmitter-side converts all input signals into the transmitted HDBaseT 3.0 signal, and extends uncompressed video signals to up 100m (330ft) over CAT copper cables at up to 4K@60Hz (4:4:4) video resolution. EXT3-21-XR-TR receiver-side is an auto-switcher with HDMI and HDBaseT inputs that receives the HDBaseT 3.0 signal and converts it back into the original input signals. The connected USB 3.2 peripherals, such as a room camera and microphone, are switchable for use of the active USB host, for convenient hybrid meeting operation with both room and online participants.
Kramer EXT3-21-XR-TR Key Features
- Hybrid Meeting Collaborative Switching: Controllable coupled-signals switching of both AV and USB host inputs enables concurrent connections for hybrid meetings, allowing multiple participants to share content seamlessly.
- High-Performance Standard Extender: Professional HDBaseT extender for extended-reach signals over twisted-pair copper infrastructures, ensuring compatibility with any HDBaseT-compliant product.
- HDMI Signal Switching and Extension: Passes HDCP 2.3, EDID, and CEC signals through, supporting HDR10, deep color, and uncompressed audio channels for high-quality video and audio performance.
- HDMI Mirroring: Mirrors input HDMI signal to loop output port, facilitating connection to local monitors or daisy chaining additional units.
- K-Pair Support: Automatically switches upon connection or disconnection of local or extended inputs for added convenience.
- Auto Switcher Ease of Use: Automatically plays the signal of the plugged source on the connected display, with priority-based pre-selection options.
- Flexible USB Switching and Extension: Active USB 3.2 host connection allows for extensible USB 2.0 signals between transmitter and receiver sides, enabling integration of local and remote USB devices.
- Multi-channel Audio Transmission: Supports up to 32 channels of uncompressed digital stereo signals for rich audio experiences.
- Audio De-embedding: Converts digital audio signals to analog and sends them to a local audio system, enhancing audio playback options.
- I-EDIDProâ„¢ Kramer Intelligent EDID Processingâ„¢: Ensures Plug and Play operation through intelligent EDID handling and pass-through algorithms.
- Convenient Power On/Off Control of Display: Easily toggles the connected display's power using a configurable control interface and button LED indication.
- Built-in Intelligent Control Gateway: Supports remote IP-driven control of AV, USB, and projection devices, streamlining integration and reducing installation complexity.
- Simple Control: Provides multiple control options via remote IP-controller connection, local buttons, or contact-closure buttons for flexibility.
- Etherean Extension: Enables up to 1 Gbps Ethernet connectivity for LAN communication and device control.
- Bidirectional RS-232 Extension: Facilitates two-way data transmission for effective device control.
- Bidirectional Infrared Extension: Allows remote control of peripheral devices at both ends of the extended line.
- Secured Operation: Supports standard IT-grade 802.1x authentication for secure LAN connectivity.
- Comprehensive Management: Includes local panel status LED, remote firmware upgrades, and flexible management options via API communication.
- Cost-effective Maintenance: Status LED indicators simplify local troubleshooting and maintenance tasks.
- Easy and Elegant Installation: Offers PoE powering options and a fan-less enclosure for versatile and convenient mounting solutions.
Kramer EXT3-21-XR-TR Specifications
| Product Type | HDBaseT 3.0 Extender |
| Transmission Distance | Up to 100m (330ft) over CAT cables |
| Video Resolution | 4K@60Hz (4:4:4) |
| USB Support | USB 3.2 |
| Audio Channels | Up to 32 channels |
| Control Interface | IP, RS-232, IR |
| Power Supply | PoE via LAN or HDBaseT |
| Dimensions (W x D x H) | 1U Rack Mountable |
| Weight | Lightweight for easy installation |
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