HKS401-M23-UKBK
4-Port 8K60 HDMI 2.1 KVM Switch w/ ADI Chip, EDID, 4K144Hz for Gaming, 4 PCs 1 Monitor
- Regular price
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$329.99 - Regular price
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$329.99 - Sale price
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$329.99
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Overview & Key Features
TESmart With You. Evolving For You!
The HKS401-M23 is designed for users like you who have multiple hosts but engage in relatively low-frequency parallel use. It supports 4-in/1-out HDMI 2.1 8K@60Hz. Perfect for video editors, it supports HDR10 and Dolby Vision for high-quality video output, ensuring stunning visuals for your creative work. The high refresh rate also provides smooth gameplay without stuttering.
Why You'll Like It:
•High Resolution Support: Up to 3840x2160 at 60Hz with 4:4:4 color format, compatible with
3840x2160@60Hz/ 2560x1440@120Hz /3440x1440@100Hz/ 1920x1080@240Hz.
•Built-in Shared USB 3.0 Hub: Share 2x USB 3.0 peripherals (such as a 4K webcam, speakerphone, keyboard, mouse, or game controller) between your two PCs or game consoles. The front USB 3.0 port also supports 7.5W (5V1.5A) charging, powering your mobile devices and tablets.
•Quick Switching with Zero Delay: Once switched, the keyboard, mouse, USB peripherals, and L/R audio are immediately available, providing a smooth, lag-free experience.
What's in the box
The kvm switch kit comes with complete kvm-to-pcs cables (HDMI 2.1 + USB 3.0) for a complete setup.
1 * 4x1 HDMI 2.1 KVM Switch
4 * KVM Cables（HDMI+USB）
1 * IR Remote Control (Without AAA Batteries)
1 * DC 12V Power Adapter
1 * User Guide
Downloads & Manual
| Country or Region | Estimated delivery time | Freight | postman |
| United States (excluding Alaska and Hawaii) | 3-5 working days | Free Shipping | UPS/USPS/ DHL/FedEx/DPD |
| Canada, U.K. | |||
| China (Macao SAR, Hong Kong SAR, Taiwan) | 3-5 working days | Starting at $30 | DHL/FedEx/UPS |
| Australia, New Zealand, Saudi Arabia, United Arab Emirates, Israel,Alaska, Hawaii | 5-12 working days | Starting at $60 | DHL/FedEx/UPS/USPS |
| Singapore, Malaysia, Philippines, Thailand | 5-12 working days | Starting at $30 | DHL/FedEx/UPS |
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Orders cannot be canceled or modified once placed due to automated processing.
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If a return is needed, contact service@tesmart.com within 30 days of delivery. Items must be in original condition with all packaging and accessories.
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Return shipping for non-quality issues is the customer’s responsibility.
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Products from third-party retailers
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Items damaged by misuse
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Order number, proof of purchase
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Photos/videos (if defective), full shipping address, and phone number
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Within 30 days: Refunds/returns accepted for both quality and non-quality issues
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30 days–1 year: No returns/refunds; repair or replacement may be offered
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1–3 years: No returns/refunds; replacement or Upgrade /trade-in at 30% discount after 4 months (members only)
The return and refund policy process overview is shown below. For the full policy, please refer to the Full Policy page below.
1.Order Cancellation & Modification
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To ensure timely delivery for every customer, TESmart’s order processing and shipping system is fully automated. Once shipped, the process is irreversible—orders cannot be canceled or modified, including address changes.
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Please kindly contact us within 30 days of delivery at service@tesmart.com, If you wish to return a product after receiving it, ensure the product and packaging are undamaged and in original condition.
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⚠️ Return shipping costs for non-quality issues are the responsibility of the customer. For more details, please kindly see below.
2.Return Process
2.1 Return Conditions:
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Products must be returned in original packaging, including all accessories, manuals, and documentation.
2.2 Items Not Eligible for Return:
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Products purchased from third-party retailers.
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Products damaged due to misuse or improper handling by the customer.
2.3 Return Request:
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Order number
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Proof of purchase
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Photos or videos of the defective product (to speed up processing)
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Full shipping address
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Contact phone number
2.4 Processing Time:
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Our support team will respond to your return request within 48 hours and provide the return warehouse address in your country/region.
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For certain countries/regions (e.g., the U.S., Germany, and the EU), we may provide a prepaid return label after confirming your address to expedite the return/refund process.
2.5 Return Address:
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Please send the product to the designated TESmart return warehouse.
2.6 Warehouse Inspection:
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Upon receipt, TESmart will inspect the returned item(s).
3. Refund Process
3.1 Refund Trigger:
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Once the returned product is received and inspected by our warehouse, the refund process will begin.
3.2 Refund Timeframe:
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Refunds will be processed within 5 business days after the return is received.
3.3 After-Sales Categories:
3.3.1 Within 30 days of delivery:
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The product is in its original packaging with all accessories.
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Return photos are provided before shipping.
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Non-quality issues: Return and refund supported within 30 days. Return shipping is the customer’s responsibility.
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Quality issues: Return and refund supported within 30 days. Return shipping is covered by TESmart.
3.3.2 From 30 days to 1 year after delivery (warranty period):
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Return/refund not supported. Please email service@tesmart.com to contact our after-sales support team.
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After evaluation by our technical team, we may offer product repair or replacement with the same model.
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To ensure timely service, we prioritize replacements.
3.3.3 From 1 to 3 years after purchase:
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Return/refund not supported.
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You may contact our after-sales support team for replacement of the same model.
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If you wish to upgrade to another product, after 4 months from purchase, members may Upgrade & Trade-in at a 30% discount off the original price.
4. After-Sales Support & Issue Resolution
4.1 Contact Information:
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For any questions or support requests, please contact TESmart Customer Service: 📧 service@tesmart.com
4.2 Delayed Refunds (if you haven’t received a refund after 5 business days):
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Check your bank account (ensure it is the one used for the purchase).
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Contact your card issuer (credit/debit card providers may experience processing delays).
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Contact your bank to confirm the transaction status.
Tech Specs
| Product Attribut | |
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Model (SKU) |
HKS401-M23-UKBK
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Compatible Setup |
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Max Resolution |
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Supported Resolutions |
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VRR (Variable Refresh Rate) |
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MST (Multi-Stream Transport) |
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Laptop Charging |
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Network Port |
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Independent Audio Focus Switching |
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Independent Audio Focus Locking |
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Thunderbolt 4 Ports |
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EDID Emulation |
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Switching Methods |
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Assignable Hotkeys |
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Legacy Emulation Mode |
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Input Ports |
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Output Ports |
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Docking Ports |
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Display Modes |
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Manual (PDF) |
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8K60 Is Only as Good as Its Stability
From 8K to 240Hz — It Just Works
4K144 HDR VRR
EDID Emulation — Stable Screens, No Surprises
Zero flicker. No resets. No black screens.
Powered by ADI 7674 decoding and advanced EDID emulation, this KVM ensures stable multi-monitor output even under high bandwidth loads.
Why it’s built different:
- ADI 7674: industry-grade HDMI 2.1 decoding
- Smart EDID: signal always-on, no display loss
- VRR / FVA / ALLM supported for smooth, tear-free gaming
- Ideal for high FPS gaming and critical creative workflows
Built for smooth gameplay, creative workflows, and ultra-clear visuals. With HDMI 2.1 and DSC, our KVM supports extreme resolutions and high refresh rates across a wide range of displays.
Each HDMI 2.1 output theoretically supports up to:
- 7680×4320 (8K UHD) — 60Hz (DSC)
- 5120×1440 (32:9 Ultra-Wide) — 120Hz (DSC)
- 3840×2160 (4K UHD) — 240Hz (DSC)
- 3440×1440 (21:9 Ultra-Wide) — 144Hz
- 2560×1440 (QHD) — 240Hz
- 1920×1080 (FHD) — 240Hz
Faster Switching. Stronger Signal. Smoother Frames.
- Fast Switching in 1–3 Seconds: No blackouts, no resets
- Signal Always-On: No disconnects during switch
- VRR / FVA / ALLM Supported: Tear-free, low-lag gaming
- 4K@120Hz HDR (12bit): Stunning clarity and colors
- Up to 4K@144Hz / 165Hz via DSC: Built for fast-action games
Powered by ADI HDMI 2.1 decoding — boosts weak signals and ensures seamless multi-monitor stability
Switching displays shouldn’t scramble your desktop. Our built-in EDID emulator keeps your layout exactly how you left it.
- No More Icon Mess
Preserves icon positions and window sizes when switching inputs. - Flicker-Free Switching
Eliminates screen blackouts and flicker caused by display reinitialization. - Smoother Multitasking
Maintain visual consistency across workstations and monitor setups.
✅ With TESmart EDID emulation: your display stays stable and unchanged — even after switching.
⚠️ Without EDID emulation: icons shift, windows resize, and screen flicker occurs after every switch.
Easy Switching, 4 Ways
Auto Detect Mode — Smart Switching, Zero Hassle
Dedicated K&M Ports with Dual-Mode Support
Switching shouldn’t slow you down — we offer four seamless methods to suit any setup or habit:
- Custom Hotkey Switching — Fast keyboard shortcuts for power users
- Front Panel Button — Simple, direct access anytime
- IR Remote — Stay in control from across the desk
- Mouse Wheel — Tap twice for instant switching
Whether you're working, gaming, or presenting — choose the way that works best for you.
No need to manually switch inputs — the KVM detects and switches to the active device as soon as it powers on.
- Intelligent Signal Detection
Automatically senses new signal input and switches focus to the latest active PC. - Hands-Free Operation
Ideal for setups with always-on desktops and occasional laptop use. - Seamless Experience
Minimizes delay or interruptions when waking devices or switching between systems.
✅ Example: When PC4 is powered on, the display switches to it automatically — no buttons needed.
To improve keyboard and mouse compatibility — especially during hotkey switching — we designed two specialized connection modes:
- Pass-Through Mode (Recommended)
Direct passthrough to the PC. Supports advanced drivers, macros, high-DPI mice, and multifunction input devices. Ideal for gaming, design, and pro workflows. - Legacy Emulation Mode
Ensures universal compatibility and stable hotkey functionality across most systems. Best for office or when driver issues occur.
✅ Hotkey commands only work when your keyboard is connected to the dedicated K&M port.
⚠️ Emulation Mode disables driver-based software and advanced features.
⚠️ Bluetooth keyboards/mice are not supported.
FAQs
Why are my monitors displaying a black screen when I connect my devices to the KVM?
- Connect the PC directly to the monitor, bypassing the KVM switch, to check if they work properly. If not, the issue might be with the input device, the monitor, or the cables. Try replacing the monitor and the cables connected to the KVM.
- If a specific input source is not displaying, swap this input port with other working input sources to see if this input source displays correctly.
- If the above steps do not resolve the problem, please contact us using the contact information below.
What refresh rates does this KVM support at 8K, 4K resolutions？
This HKS401-M23 supports HDMI 2.1, HDCP 2.1, with a maximum bandwidth of up to 48Gbps.
- 7680x4320@30Hz 8bit
- 3840x2160@144Hz 8bit
- 7680x4320@60Hz (DSC) 8bit
- 3840x2160@120Hz (DSC) 12bit
How do I customize hotkeys?
- Press and hold the [Select④] button on the front panel until you hear a long beep. Then, press any key within 5 seconds to set it as the hotkey.
- Press [Hotkey + Hotkey + F1], then press any key within 5 seconds to set it as the hotkey.
What to do if the hotkey is not working?
- Please check if the keyboard is plugged into the USB 3.0 port of the KVM. If so, make sure the keyboard is connected to the dedicated keyboard port on the rear panel (with keyboard and mouse marks).
- The default hotkey for the HKS401-M23 is the right Ctrl. If you need to use a different hotkey, please customize the hotkey settings accordingly.
- It supports the keyboard and mouse pass-through mode and legacy emulation mode. Pass-through mode has good compatibility with the mainstream keyboard on the market, but with the iterative upgrading of the keyboard and mice, it is inevitable that there are some models of keyboard and mouse which have potential compatibility issues with our KVM, to improve compatibility, we have added legacy emulation mode. If you encounter issues with the keyboard and mouse in pass-through mode, please connect a basic keyboard and switch to legacy emulation mode using the hotkey [Hotkey + Hotkey + F2]. This mode enhances the compatibility of the keyboard and mouse. Once set successfully, you can reconnect your original keyboard and continue using it.
What is the difference between the keyboard and mouse pass-through mode and legacy emulation mode, and how do you switch between them?
- Legacy emulation mode provides the PC with preset basic keyboard and mouse information, ensuring basic functionality while improving compatibility. This means that the computer will not recognize the keyboard and mouse, and the control software of keyboard and mouse will not work. If the keyboard and mouse function correctly in pass-through mode, it is recommended to use pass-through mode.
- The default keyboard and mouse mode is Pass Through mode. You can switch them using the hotkey [Hotkey + Hotkey + F2]. When press the hotkey, two beeps indicate entry into legacy emulation mode, while one beep indicates entry into pass-through mode.
Can the USB 3.0 port on the front panel charge my computer? What’s the power output?
The USB 3.0 port on the front panel features a built-in charging module that can charge your phone, tablet, and other devices with a maximum output power of 7.5W.
It is designed according to the BC1.2 protocol and can automatically adjust the voltage and current to match the specifications of the charging device, ensuring safe charging.
Why can't I hear any sound when I plug my audio device into the 3.5mm audio port of the KVM?
For HKS401-P23 which has a dedicated microphone interface or headset interface, the audio signal is transmitted via the USB channel. Please make sure that you have selected the correct USB audio device in your computer's audio settings.
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Free Shipping
US / CA / UK · 3–5 Business Days
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30-Day Free Returns
Hassle-Free Return & Purchase Guarantee
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Extended Warranty: 1+2 Years
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