Kramer Electronics EXT3-21-XR-TR HDMI AV+ USB+ GE 2-Δρόμων PoE Smart Tx & 2x1 Switcher Rx (50-80584090)

Experience uncompressed 4K@60Hz (4:4:4) HDMI, USB 3.0, and Gigabit Ethernet over a single CAT cable with the Kramer EXT3-21-XR-TR, a powerful HDBaseT 3.0 transmitter and receiver kit. Delivering 18 Gbps data rate and 2-way Power over Ethernet, this smart solution extends AV, USB, and control signals up to 40m at 4K or 70m at 1080p.

Overview

The EXT3-21-XR-TR is a professional-grade HDBaseT 3.0 extender kit that includes a transmitter and a receiver with a built-in 2x1 HDMI switcher. It supports HDMI 2.0, HDCP 2.3, USB 2.0/3.0, and 1G Ethernet pass-through, making it ideal for conference rooms, classrooms, and collaborative spaces. The transmitter features one HDMI input and one USB-B host port, while the receiver offers two HDMI inputs, one HDBaseT input, and two USB-A device ports. Control is via RS-232 and IR, and the units are surface mountable with PicoTOOLS® design.

What stands out

• HDBaseT 3.0 technology for high-performance extension
• Supports 4K@60Hz (4:4:4) with 18 Gbps data rate
• 2-way Power over Ethernet (PoE) for flexible installation
• USB 3.0 extension up to 5 Gbps
• Built-in 2x1 HDMI switcher on receiver
• Extends up to 40m at 4K, 70m at 1080p
• HDCP 2.3 compliant
• Surface mountable compact design

Technical details

• Transmitter inputs: 1x HDMI, 1x USB-B (Host)
• Receiver inputs: 1x HDBaseT (RJ-45), 2x HDMI, 1x USB-A (Device)
• Receiver outputs: 1x HDMI, 2x USB-A (Device)
• Audio support: LPCM, Dolby Digital, DTS-HD Master Audio
• Control ports: RS-232, IR
• Ethernet: 1G pass-through
• Power: 2-way PoE (IEEE 802.3af/at)

Our verdict

A versatile and robust extender kit that combines AV, USB, and Ethernet extension with PoE flexibility, perfect for modern AV installations.