The OREI BK-EXB400R-K is a professional-grade HDMI over Ethernet extender that leverages HDBaseT technology to transmit UltraHD signals over a single Cat6 or Cat7 cable. Designed for installations requiring long-distance signal distribution, this balun supports 4K resolution at 120Hz and 8K at 30Hz, making it suitable for high-refresh-rate gaming, live events, and commercial displays. The unit extends HDMI signals up to 400 feet without signal degradation, providing a reliable alternative to direct HDMI cabling. Constructed with a durable aluminum alloy enclosure, the extender offers effective heat dissipation and robust build quality.

The housing is compact and designed for easy mounting in equipment racks or behind displays. Internal components are selected for consistent performance and long-term reliability, minimizing the risk of signal dropout or instability. The unit supports HDR pass-through, CEC control, IR extension, and RS-232 serial communication, allowing seamless integration with existing control systems. Power over Cable (PoC) eliminates the need for separate power adapters at the receiver end, simplifying installations.

Setting up the extender is straightforward: connect the transmitter to the source, the receiver to the display, and link them with a single Ethernet cable. The unit automatically negotiates the best resolution and protocol, supporting a wide range of HDMI formats. The included audio output on the receiver enables easy connection to external sound systems.

With support for IR repeaters and RS-232 commands, the extender can be used in complex automation scenarios, from home theaters to boardroom presentations. The device maintains low latency and stable transmission, ensuring smooth video playback and responsive interaction. The OREI BK-EXB400R-K delivers a practical solution for extending HDMI signals over long distances without sacrificing quality.

Its feature set covers many professional needs, including HDR, CEC, and serial control, while the PoC function reduces cable clutter. Priced competitively, this extender offers substantial value for system integrators and AV enthusiasts seeking reliable performance in an accessible range. The combination of solid construction, versatile features, and straightforward operation makes it a consistent choice for extended HDMI distribution.