1 / 7UGREEN CM843-85489 14-in-1 Triple-Display Dock
Triple-Display: The UGREEN CM843-85489 docking station combines video outputs, USB connectivity, card readers, Ethernet and audio through a laptop dock. Its listing claims three simultaneous 4K displays, but compatibility and display behaviour depend on the host computer and operating system.
At a glance
- The port mix brings two DisplayPort outputs, HDMI, USB, Ethernet, SD/TF readers and a 3.5mm audio connection to one dock.
- Listing claims support for three 4K monitors, while either DisplayPort can handle a single display up to 8K@30Hz or 4K@120Hz under stated host and cable conditions.
- Laptop charging is rated up to 100W. The laptop and 27W USB-C charging outputs share a combined 100W budget.
- Two front USB-C ports are specified for data only, not display or charging.
Reference price: £89.99
Price checked: 12 Nov 2026
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Pros and cons
Pros
- Broad connection mix includes display outputs, USB, Ethernet, card readers and 3.5mm audio.
- The listing specifies up to 100W laptop charging and a separate USB-C charging output rated up to 27W.
- Useful for compatible Windows laptops that need several peripherals connected through one dock.
Cons
- The stated 100W laptop charging maximum is conditional and may be reduced when the 27W USB-C output is also in use.
- The two front USB-C data ports do not support charging or display output.
Technical specifications
25 specifications| Brand | UGREEN |
|---|---|
| Model | CM843-85489 |
| Colour | Grey |
| Number of ports | 14 |
|---|---|
| Total USB ports | 8 |
| Hardware interface | 3.5mm Audio, DisplayPort, Ethernet, HDMI, MicroSD, USB 3.0 Type A, USB 3.2 Gen 2×2 |
| HDMI ports | 1 |
| USB-C data ports | 2 USB-C 10Gbps data ports |
| USB-A ports | 2 USB-A ports |
| Card reader slots | SD/TF card slots |
| Multi-monitor claim | Simultaneously drive three 4K monitors via dual DisplayPort and a HDMI port |
|---|---|
| Single DisplayPort claim | up to 8K@30Hz or 4K@120Hz for a single monitor |
| Laptop upstream power delivery | 100W |
|---|---|
| USB-C power output | 27W |
| DC input | 140W DC input |
| Wattage | 100 watts |
| Input voltage | 24 Volts (DC) |
| USB data speed claim | 10Gbps |
|---|---|
| SD/TF transfer claim | 170MB/s |
| Ethernet claim | Gigabit Ethernet |
| Supported connections | USB-C, USB4, and Thunderbolt connections |
|---|---|
| Laptop port requirements | DP Alt Mode and Power Delivery |
| Minimum required operating system version | Windows 10 |
| Listed compatible devices | ThinkPad, Dell XPS, HP EliteBook, Surface |
| Weight listed | 1 Kilograms |
|---|
What to know before buying
Listing details to confirm
Display and charging depend on host support: the laptop USB-C port needs DisplayPort Alt Mode and Power Delivery, while the single-display 8K@30Hz or 4K@120Hz claim requires DP 1.4 with DSC and a DisplayPort 1.4 cable no longer than 3 m. For 100W laptop charging, the laptop must support PD 3.0 and the 27W USB-C output must be unused. The two USB-C outputs share 100W, and laptops needing more than 100W should use their original adapter. Listing details are inconsistent or unconfirmed: the title specifies two DisplayPort outputs plus HDMI, whereas a separate product title elsewhere describes two HDMI plus DisplayPort. A details field lists eight USB ports, but the feature list names two USB-C 10Gbps, two USB-A and two front USB-C ports. The claimed triple-display support is qualified by a note that macOS shows identical content on external monitors, and the model's MacBook compatibility is not clearly established. Confirm the selected listing's port layout and your laptop's display support.
Who is it for?
A good fit for
- Windows laptop users with USB-C, USB4 or Thunderbolt connectivity, DisplayPort Alt Mode and Power Delivery who want a multi-display desktop connection.
- Desk setups needing a mix of external displays, USB devices, Ethernet, card readers and audio through a dock.
Less suited to
- Mac users who need different content across multiple external monitors.
- Laptops without USB-C DisplayPort Alt Mode and Power Delivery support, or users whose laptop requires more than 100W charging from the dock.
Customer reviews on Amazon
- 5 stars
56% 56% - 4 stars
12% 12% - 3 stars
6% 6% - 2 stars
6% 6% - 1 star
20% 20%
Customer feedback is positive about perceived build quality and the supplied power supply, while compatibility, connectivity and value receive mixed reactions. Some reports describe successful operation, while others mention MacBook problems or the dock stopping after three months. That uncertainty matters because the listing makes host-port support and operating-system display behaviour important conditions. The overall ratings are mixed rather than uniformly positive.
Positive themes
- Customers describe the device's quality positively.
- Customers mention the power supply positively.
Mixed feedback
- Compatibility receives mixed feedback, including reports of MacBook issues and devices stopping after three months.
- Connectivity and value for money receive mixed feedback.
Frequently asked questions
Can this dock run three external displays?
The listing claims simultaneous triple 4K output through two DisplayPort connections and HDMI. The host laptop must support the required video output, and the supplied note says macOS external displays show identical content.
Will it charge a laptop at 100W?
The dock is rated for up to 100W laptop charging when the laptop supports PD 3.0 and the 27W USB-C output is unused. The two USB-C power outputs share a combined 100W, and laptops requiring more should use their original adapter.
Do the front USB-C ports support charging or video?
No. The listing identifies the front USB-C ports as data-transfer only, without charging or display support.
What laptop port support is required?
The laptop's USB-C port needs DisplayPort Alt Mode and Power Delivery. The listing also names USB4 and Thunderbolt connections as supported.
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