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The HKM01-4K HDMI® KVM Extender is designed to support 4K30Hz resolution and USB KVM transmission. You can opt for KVM over Ethernet or KVM over fiber transmission and enjoy seamless extension. The USB KVM extender also supports bidirectional audio, RS232, and IR signals, streamlining device management, and featuring EDID management for easy display configuration. Also come with 4K60Hz version, HKM01-4K6G.
A direct comparison shows the HKM01-4K stopwatch aligned with the bottom-right original (unextended) source.
This side-by-side comparison validates SwiftSync performance on the HKM01-4K HDMI® KVM Extender for mission-critical use cases where every millisecond matters. Key benefits include virtually zero-lag mouse tracking, tear-free visuals, and native-like responsiveness.
Flexible audio configuration for different setups. Based on how the 3.5 mm audio jack is connected, the HKM01-4K automatically configures the appropriate audio input and output paths. It also supports remote microphone return audio to the host computer. For wiring and setup details, please refer to the user manual.
SwiftSync is a high-efficiency HDMI® transmission technology that offers a cost-effective alternative to uncompressed HDBaseT. With advanced 1G compression, it supports 4K@60Hz and keeps latency under 2 frames (0.03 seconds) —near real-time with no visible delay.
Update Steps:
Release Date
Ver.
Release Note
File Name
Release Date
October 16, 2025
Ver.
V1.0_2510161
Release Date
October 16, 2025
Ver.
V1.0_2510161
Release Date
October 19, 2022
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V1.0_2210191
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October 19, 2022
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V1.0_2210191
Release Date
June 26, 2019
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V1.0_1906261
Release Date
June 26, 2019
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V1.0_1906261
In most cases, no. You can refer to our mouse-drag test video, or check the cursor coordinate overlay in the video. (In the test, the upper-right view is HKM01-4K.)
For best performance, keep the network cable at least 30 cm away from power lines to reduce interference.
HKM01-4K uses light compression, but it should not create visible blur under normal viewing conditions. Banding, blocking, and motion breakup are not expected.
You can also refer to our image-quality test video. In the comparison, the lower-left is the extender with heavier compression, while the upper-right is HKM01-4K.
Yes. HKM01R-4K supports webcams. It works with not only keyboard and mouse, but also most USB 2.0 devices. USB 3.0 is not supported.
SFP+ Single-Mode Modules
SFP+ Multimode Modules
SC&T provides modules that use LC connectors. If you'd like to use other fiber connectors, please purchase the corresponding fiber modules.
For more information on fiber optic cables and modules, see What Should We Consider When Choosing Fiber Optic Cables and Extenders?
Yes, you can use other SFP+ modules, with a maximum distance of 60km.
Any questions about the product? Contact us by filling in the inquiry form in a few seconds, and get the quickest response from us!
1. All specifications are subject to change without notice.
2. Brand and product names mentioned are trademarks of their respective companies.
3. The terms HDMI, HDMI High-Definition Multimedia Interface, HDMI Trade dress and the HDMI Logos are trademarks or registered trademarks of HDMI Licensing Administrator, Inc.
