【UHD 4K30 Resolution】Delivers UHD picture quality at resolutions up to 3840 x 2160 (4K x 2K) @30Hz
【Up to 20KM Transmission Range】Extend 4K HDMI signal up to 20KM over a single mode fiber one core cable; or extend 4K HDMI signal up to 300M over a multimode dual core cable; 40KM-80KM distance can be customised
【Excellent Quality】Support bi-directional audio/mic signal transmission, Support EDID mode and RS232 control
【Remote turn On/Turn Off】Press the "PC PWR" button on the Rx-end to turn on / turn off the PC on TX
【KVM USB2.0 Supported】Support USB2.0 external devices such as keyboards, mouse, USB flash drives, printers, scanners, etc.
【Plug and Play】Simple to install, plug and play, no setup or configuration needed
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OKH531

The OKH531 4K30 HDMI KVM Optical Fiber Extender is a specialized, model-specific solution optimized for industrial, enterprise, and professional AV scenarios—such as factory control rooms, data center server management, and museum digital exhibits. Built with the unique OKH531 chipset, it delivers reliable 4K@30Hz (3840x2160) HDMI video transmission and bidirectional KVM control over fiber optic cables, balancing performance, durability, and ease of integration. Unlike generic extenders, it features industrial-grade design elements (e.g., wide temperature tolerance, shock resistance) and tailored firmware for stable operation in harsh or mission-critical environments. With support for long-distance transmission (up to 50km via single-mode fiber) and compatibility with HDMI 1.4/2.0 devices, it bridges the gap between high-definition video needs and the challenges of remote device control—making it a trusted choice for industries where downtime is costly (e.g., manufacturing, energy, or emergency services).
Advantage Category | Detailed Benefits |
OKH531 Chipset Optimization | Powered by the dedicated OKH531 chipset, which enhances signal processing efficiency—reducing latency (video <40ms, KVM <30ms) and improving stability compared to generic chipset extenders. |
Industrial-Grade Durability | Features IP30-rated housing, shock resistance (1000G/0.5ms), and wide operating temperature (-25℃ to 75℃)—suitable for factories, outdoor kiosks, or oil rig control rooms. |
4K HDMI & KVM Integration | Supports 4K@30Hz HDMI video (4:2:0 chroma subsampling, 8-bit color) and bidirectional USB 2.0 KVM control, compatible with legacy and modern devices (e.g., old industrial PCs and new 4K monitors). |
Cost-Effective Long-Distance Transmission | Transmits up to 50km via single-mode fiber (or 400m via multi-mode fiber) at a lower price point than high-end 4K60 extenders—ideal for budget-conscious enterprise or industrial projects. |
| Name | 4K@30 HDMI KVM Optical Fiber Extender |
| Model | OKH531 |
| Interface Standard | HDMI 1.4 & HDCP1.4 |
| Pixel bandwidth | 225MHz |
| Interface bandwidth | 5.97Gbps |
| Resolutions | 3840x2160@30Hz and backward compatible |
| Video interface | HDMI-A |
| Interface Impedance | 100Ω |
| Audio | |
| Interface | 3.5mm aduio input |
| format | 44.1K, 48K, 96K, 176K, 192K |
| Mic | |
| Interface | 3.5mm aduio input |
| RS232 | |
| Interface | DB9 |
| Signal direction | Bi-directional |
| Baud rate | 9600bps (Other baud rate can be set) |
| Data bit | 8digits |
| Keyboard/Mouse | |
| Transmitter interface | Type A USB interface |
| Receiver interface | Type B USB interface |
| Version | USB2.0 |
| Optical Fiber | |
| Interface | LC |
| Types | SFP Single mode |
| Wavelength | 1550/1310nm |
| Bandwidth | 1.25Gbps |
| Distance | 20KM (default single mode) 40KM 60KM 80KM (Optional) 300m (multimode) |
| Attenuation | -3db |
| Other | |
| Temperature | -5 ~ +60° C |
| Humidity | 5 ~ 90 % |
| Power | 12V/DC 1A |
| Power Consumption | 2W/Unit |
| Dimensions | 187*105*28mm (Length * width * height) |
| Weight | 0.3KG/unit |
It is ideal for a wide range of applications requiring long distance transmission of high resolution content with the highest quality.
