BDFFLY USB 3.0 HDMI KVM Switch User Manual

1. Introduction

The BDFFLY USB 3.0 HDMI KVM Switch (Model S4H2-JP) is designed to allow control of up to four computers using a single set of keyboard, mouse, and two monitors. This device supports high-resolution video output up to 4K@60Hz and includes three USB 3.0 ports for sharing additional peripherals. It is an efficient solution for managing multiple systems in a streamlined workspace.

2. Package Contents

Please verify that all items listed below are included in your package:

• 1 x HDMI KVM Switcher Host
• 4 x USB-A to USB-A USB 3.0 Cables (1.2m)
• 1 x USB-A to USB-C Power Cable
• 2 x HDMI 2.0 Cables
• 1 x User Manual
• 1 x Warranty Card

Figure 2.1: KVM Switch and included accessories.

3. Product Features

• 4-Port HDMI KVM Switch: Control up to four computers with two monitors and a single set of USB keyboard and mouse.
• Ultra HD 4K@60Hz Support: Experience resolutions up to 3840*2160@60Hz, backward compatible with 3840*2160@30Hz and 1920*1080P@60Hz. Compatible with HDMI 2.0 and HDCP2.2 standards.
• 3 USB 3.0 Ports: Share USB devices such as keyboards, mice, scanners, printers, and USB drives with a data transfer rate of up to 5Gbps.
• Adaptive EDID: Enhances image transmission stability and smoothness by automatically recognizing and matching various display devices.
• Button Control: Easily switch between connected computers using the front panel buttons. Hotkey switching is not supported.
• Broad Compatibility: Supports various input devices like PCs, laptops, and PS4, and is compatible with operating systems including Windows, Linux, and Mac.

Figure 3.1: Overview of KVM switch functionality.

Figure 3.2: KVM switch supporting up to 4K@60Hz resolution.

Figure 3.3: USB 3.0 ports for high-speed data transfer.

4. Setup Instructions

Follow these steps to connect your KVM switch:

1. Connect Monitors: Connect your two monitors to the KVM switch's "HD OUT A" and "HD OUT B" ports using the provided HDMI 2.0 cables.
2. Connect Computers (Video): For each computer (PC1, PC2, PC3, PC4), connect its primary HDMI output to the corresponding "HD IN A" port on the KVM switch. Connect its secondary HDMI output to the corresponding "HD IN B" port.
3. Connect Computers (USB): For each computer, connect one end of a USB-A to USB-A 3.0 cable to the KVM switch's corresponding "USB" input port (e.g., PC1 USB to PC1 IN USB) and the other end to a USB port on your computer. This connection is essential for both USB peripheral sharing and monitor detection.
4. Connect Peripherals: Connect your USB keyboard, mouse, and any other USB 3.0 peripherals (e.g., printer, USB drive) to the three USB 3.0 ports on the front panel of the KVM switch.
5. Power Connection: Connect the USB-A to USB-C power cable to the KVM switch's "5V IN" port and to a 5V power adapter (not included) or a USB port on one of your computers.
6. Power On: Ensure all connections are secure, then power on the KVM switch and all connected computers and monitors.

Important Notes:

• For optimal performance and to achieve 4K@60Hz resolution, ensure that all input devices (computers), HDMI cables, and output devices (monitors) support 4K@60Hz.
• All cables must be connected correctly for the KVM switch to function as intended.
• If your computer lacks dual HDMI ports, refer to the compatibility chart below for alternative connection methods using DP or USB-C ports with appropriate adapters.

Figure 4.1: Connection diagram for the KVM switch.

Figure 4.2: Alternative connection methods for various computer port types.

5. Operating Instructions

The BDFFLY KVM Switch offers straightforward operation:

• Switching Computers: To switch between connected computers, press the corresponding PC selection button (PC1, PC2, PC3, or PC4) on the front panel of the KVM switch. The LED indicator will illuminate for the active computer.
• Display Modes: The KVM switch supports two primary display modes for your monitors:
  • Extended Display Mode: Each monitor displays a different part of the desktop, extending your workspace.
  • Copy Display Mode (Mirror Mode): Both monitors display the same content, mirroring your desktop.

Note: Hotkey switching via keyboard commands is not supported by this model. Switching is performed exclusively via the physical buttons on the device.

Figure 5.1: Button switching on the KVM device.

Figure 5.2: Supported display modes: Extended and Copy (Mirror).

6. Maintenance

To ensure the longevity and optimal performance of your KVM switch, please observe the following maintenance guidelines:

• Cleaning: Use a soft, dry cloth to clean the exterior of the device. Avoid using liquid cleaners or abrasive materials.
• Environment: Keep the KVM switch in a dry, well-ventilated area, away from direct sunlight, high temperatures (above 70°C), and excessive humidity.
• Handling: Avoid dropping or subjecting the device to strong impacts. Do not attempt to disassemble or modify the KVM switch, as this will void the warranty.
• Power: Always use the provided power cable or a compatible 5V power source.

7. Troubleshooting

If you encounter issues with your KVM switch, please refer to the following common problems and solutions:

• No Display or Incorrect Resolution:
  • Ensure all HDMI cables are securely connected between the computers, KVM switch, and monitors.
  • Verify that both your input devices (computers) and output devices (monitors) support the desired resolution (e.g., 4K@60Hz).
  • Confirm that the USB input port from the computer is connected to the KVM switch, as this is crucial for monitor detection and proper functionality.
  • Try restarting the KVM switch and the connected computers.
• USB Devices (Keyboard/Mouse) Not Responding:
  • Ensure the USB-A to USB-A 3.0 cables are firmly connected from each computer to the KVM switch.
  • Check that your keyboard and mouse are connected to the dedicated USB 3.0 ports on the KVM switch.
  • Some specific mouse functions (e.g., scroll wheel) may occasionally require the mouse to be briefly disconnected and reconnected, or powered off/on, after switching between computers.
  • If using a wireless keyboard/mouse, ensure the receiver is connected to one of the USB 3.0 ports on the KVM switch.
• No Power to KVM Switch:
  • Verify that the USB-C power cable is securely connected to the KVM switch and a functional 5V power source.
  • Ensure the power source is providing adequate power.
• Audio Issues:
  • This KVM switch transmits audio through the HDMI connection. Ensure your monitors or connected audio devices are properly configured for HDMI audio output.

8. Specifications

9. Warranty and Support

Your BDFFLY KVM Switch comes with a Warranty Card included in the package. For any questions, concerns, or technical assistance, please contact us directly. When reaching out, please provide your order number to help us offer prompt and satisfactory solutions.