The AdderLink XD Standard Single 4K Displayport Extender Pair with USA Mains Cables from Adder is a high-performance KVMA (Keyboard, Video, Mouse, and Audio) extender that is designed to provide reliable and real-time access to critical computers, regardless of the location, whilst maintaining the same user desktop experience. Developed for enterprise organizations and high-pressure control rooms, it combines the simplicity of true plug and play and high-performance HD KVM extension, resulting in superior functionality and flexibility in a cost-effective, reliable, and straightforward solution.
The ADDERLink XD641 is a high-performance KVMA (Keyboard, Video, Mouse, and Audio) extender that is created to provide reliable and real-time access to crucial computers – regardless of the location while maintaining the same user desktop experience.
Produced for enterprise organizations and high-pressure control rooms, it combines the simplicity of true plug-and-play and high-performance 4K KVM extension, resulting in superior functionality and flexibility in a cost-effective, reliable and straightforward solution.

- Single-head 4K60 video, USB2.0 and audio via single CATx or Fiber cable
- Point-to-point protocol for ultra-low latency
- Flexibility between copper and fiber connectivity
- Adder’s USB emulation ensures reliable computer bootup
AdderLink XD extender modules provide support for:
- High quality digital video
- Video resolutions up to 4K 4096 x 2160 @60Hz
- USB keyboard and mouse plus two other USB devices (up to USB 2.0)
- RS232 can be passed between the units to a maximum baud rate 115K2 with RTS/CTS flow control
- HD audio quality (stereo audio, 24-bit sampled at 96kHz) for line in/out, microphone and headphone speakers
ADDERLink XD641 Features
High-resolution video, real-time control
The system supports resolutions up to 4096×2160 @ 60Hz using 8 bits per color and 4:4:4 chroma sampling.
Single cable
Video, audio, USB HID (human interface device), hi-speed transparent USB and RS232 signals are transmitted over a single CATx or fiber cable.
Up to 4km/2.5 mile extension distances
The ADDERLink XD641 supports both copper and fiber interfaces. It provides a range of up to 100m over a CAT6 cable link, and up to 4km over an optical fiber link.
Emulated USB2.0
Enables connection of any full and low speed USB HID from mouse and keyboards through to graphics tablets and joysticks.
EDID management
The system has intelligent EDID management to allow the true characteristics of the monitor to be passed back to the computer.
Plug and Play
The ADDERLink XD641 extender is delivered in a zero config. state so it works, without the need for drivers or software, as soon as it is connected.
Digital audio
Video: Encapsulates eight channels of 24-bit, 192kHz sampled “Pulse-code modulation” (PCM) uncompressed audio integrated with video signal. USB: Two channels of 24-bit, 96kHz sampled PCM audio.
HD quality analog audio
HD audio quality (stereo audio, 24-bit sampled at 96kHz) is available for line in/out, microphone and headphone or speakers.
Serial communications
RS232 can be passed between the units to a maximum baud rate 115K2 with RTS/CTS flow control.






