Smartlinx
Thunderbolt 4 Dock – 21-Ports Laptop Docking Station Dual Monitor 90W–USB-C
Bottom line: The Smartlinx Thunderbolt 4 Dock: 40Gbps Thunderbolt 4 with 21 ports on one dock; main trade-off: dual 4K on macOS excludes M1 Macs.
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Pros & Cons
Pros
- ✓ 40Gbps Thunderbolt 4 with 21 ports on one dock
- ✓ Dual 4K@60Hz or single 8K@60Hz output (Windows)
- ✓ 90W laptop charging plus 20W fast phone charging
- ✓ Works with M1-M4 MacBook Air/Pro, Windows, Chrome
- ✓ 12-month Smartlinx warranty with Amazon support
Cons
- ✗ Dual 4K on macOS excludes M1 Macs
- ✗ 7th Gen or older Intel laptops get limited functionality
- ✗ Charging unstable for laptops needing over 90W
- ✗ Internal supply is 60W, capped 90W passthrough
SpecPicks Verdict
SpecPicks scored Smartlinx Thunderbolt 4 Dock using a rating × review-volume × price-fit model applied to published specs and reviews across the accessories category. Smartlinx's accessories lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.
Common buyer scenarios for accessories of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.
Key Features
- [Compatibility Notice] - Fully compatible with most laptops using 8th Gen Intel processors or newer. Devices with 7th Gen or older may experience limited functionality due to hardware constraints.
- [Fast & Efficient Charging] - Equipped with a 60W power charging, this USB-C supports up to 90W laptop charging and 20W fast charging for phones, tablets, or power banks. Note: Devices over 90W may charge unstably.
- [Single 8K or Dual 4K@60Hz Display Support] - This USB-C dock features 40Gbps and 8K DP ports. Supports dual 4K@60Hz on macOS (excluding M1 Macs) and up to 8K@60Hz + 4K@60Hz on Windows.
- 12-Month Warranty] – Backed by SMARTLINX with a 12-month warranty. Contact us anytime via Amazon for support.
Full Specifications
| Brand | Smartlinx |
|---|---|
| Color | Gray |
| Unit Count | 1 Count |
| Connectivity | USB-C |
| Model Number | SL-019 |
| Compatibility | Mac |
| Mfr Part Number | SL-019 |
| Number of Items | 1 |
| Number of Ports | 21 |
| Special Feature | Anti-Slip, Fast Charging, Fast Data Transfer, Portable, Powered |
| Total Usb Ports | 9 |
| Compatible Devices | Compatible with Dell, Lenovo, HP and Apple Devices using 8th Gen Intel processors |
| Data Transfer Rate | 40 gigabits_per_second |
| Enclosure Material | Plastic |
| Hardware Interface | Ethernet, HDMI, Thunderbolt, USB 3.0, USB Type C |
| Additional Features | Anti-Slip, Fast Charging, Fast Data Transfer, Portable, Powered |
| Warranty Description | 1 Year |
Ready to buy?
Thunderbolt 4 Dock – 21-Ports Laptop Docking Station Dual Monitor 90W–USB-C is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
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