Smartlinx
Thunderbolt 4 Dock – 21-Ports Laptop Docking Station Dual Monitor for MacBook Air/Pro (M1–M4), Windows & Chrome – Dual 4K or Single 8K Display, 40Gbps Speed, 90W Charging, USB-C/A Hub
*Price sourced from Amazon.com. Last updated 2026-05-24. Price and availability subject to change.
SpecPicks Verdict
SpecPicks classifies Thunderbolt 4 Dock – 21-Ports Laptop Docking Station Dual Monitor… as a niche pick — read recent reviews before buying in the accessories category, based on 213 verified Amazon reviews and our ranking model that weights rating × review-volume × price-fit. Smartlinx's positioning sits within the broader category mid-tier. Use the Compare tool to put it side-by-side with two or three close alternatives before clicking through to Amazon.
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 Amazon listing before purchase. Prices, stock, and Prime eligibility update directly from Amazon's catalog and may have moved since this page was last verified.
Pros & Cons
Pros
- ✓ Backed by Smartlinx's warranty and support channels
- ✓ Ships via Amazon with Prime eligibility and the standard returns policy
Cons
- ✗ Below-average customer rating — read recent reviews before buying
- ✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
- ✗ Price, stock, and Prime eligibility update from Amazon and may have changed since this page was last verified
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 |
| Connectivity | USB-C |
| Model Number | SL-019 |
| Compatibility | Mac |
| Mfr Part Number | SL-019 |
| Number of Ports | 21 |
| Total USB Ports | 9 |
| Total Usb Ports | 9 |
| Operating System | Chrome OS, Mac OS, Windows |
| Compatible Devices | Laptops |
| Data Transfer Rate | 40 Gigabits Per Second |
| Enclosure Material | Plastic |
| Hardware Interface | USB 3.0 |
Ready to buy?
Thunderbolt 4 Dock – 21-Ports Laptop Docking Station Dual Monitor for MacBook Air/Pro (M1–M4), Windows & Chrome – Dual 4K or Single 8K Display, 40Gbps Speed, 90W Charging, USB-C/A Hub is available on Amazon with Prime shipping and the full Amazon returns policy. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-05-24. Price and availability subject to change.
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