Last Updated: September 24, 2026
The CalDigit TS4 has become a reference point for Thunderbolt 4 docks. Its selling point is simple: more ports than almost any competitor, strong host charging and 2.5 Gigabit Ethernet in one aluminium box. It is not the cheapest dock and it does not magically overcome a laptop’s display limits, but for people who connect a lot of peripherals it is one of the most complete options available. This review covers what the TS4 offers, where it excels, where it falls short and who should buy it.
📄 In This Review
Quick answer: Our top pick in 2026 is the Connection — our #1 rated choice. See the full ranked comparison, alternatives and buying advice below.
Key specifications
CalDigit markets the TS4 as an 18-port Thunderbolt 4 dock. The headline features, per CalDigit’s published specifications, include:
| Feature | CalDigit TS4 (per manufacturer specs) |
|---|---|
| Connection | Thunderbolt 4 host port, 40Gbps |
| Host charging | Up to 98W |
| Downstream Thunderbolt 4 | 3 ports |
| Video | DisplayPort 1.4 plus video over Thunderbolt ports |
| USB | Multiple 10Gbps USB-A and USB-C ports |
| Networking | 2.5 Gigabit Ethernet |
| Card readers | SD and microSD, UHS-II |
| Audio | Separate audio in, audio out and combo jack |
| Power supply | External 230W adapter |
| Launch price | Around $400 (check current pricing) |
Port counts and supported display modes can change between revisions; check CalDigit’s current spec sheet.
Design and build
See also: Home office trends for hybrid work 2026 • AI features in home office gadgets 2026
The TS4 is a vertical or horizontal aluminium block that doubles as a heat sink. It runs warm under load but has no fan, so it is silent. Most ports face the rear, with a handful at the front for card readers, audio and quick USB access. The front-facing card readers and USB ports are genuinely useful for photographers and anyone who plugs in drives often.
Display support
Display support depends on your computer more than on the dock. On Windows Thunderbolt 4 laptops, the TS4 can drive two 4K displays at 60Hz, using the DisplayPort output and a downstream Thunderbolt port, or higher resolutions on a single screen. On Macs, M1 Pro/Max and later Pro and Max chips can run multiple displays through it. Base M1 and M2 Macs are limited to one external display natively; the TS4 does not include DisplayLink, so it cannot bypass that limit. Check your laptop’s display specifications before assuming dual-monitor support.
Performance in daily use
Charging
98W covers most laptops, including 14-inch and 16-inch MacBook Pros under typical workloads, although a 16-inch MacBook Pro under sustained heavy load can draw more than that and may slowly drain. Most ultrabooks and business laptops are fully covered.
Networking
2.5GbE is a real advantage for users with a fast NAS or multi-gig internet. With a standard Gigabit router, you will not see a difference over Gigabit docks.
Peripherals
Three downstream Thunderbolt 4 ports let you connect fast external SSDs, a second dock or Thunderbolt displays. With many 10Gbps USB ports, it is hard to run out of connections.
Strengths and weaknesses
Strengths
Very large port count, 2.5GbE, UHS-II card readers, strong charging, three downstream Thunderbolt ports and a solid, quiet build. CalDigit also has a good reputation for firmware support.
Weaknesses
Only one dedicated video output means a second monitor often needs a Thunderbolt-to-DisplayPort or HDMI cable or adapter. The external power brick is large. The price is at the high end of Thunderbolt 4 docks. It cannot add displays beyond a Mac’s native limit.
Who should buy it
The TS4 suits creative professionals, developers and power users with many peripherals: external drives, card readers, audio interfaces, a NAS and multiple displays on a capable laptop. Users who only need two monitors and a keyboard can save money with a simpler dock. Base M1 or M2 Mac users who want two screens should look at DisplayLink docks instead.
Alternatives to consider
The StarTech TB4CDOCK offers three downstream Thunderbolt 4 ports at a lower tier. The Belkin Connect Pro includes two HDMI ports for simpler dual-monitor setups. Users with Thunderbolt 5 laptops may prefer a Thunderbolt 5 dock such as the Kensington SD5000T5 EQ for higher-refresh displays.
FAQ
Does the CalDigit TS4 support two monitors on a MacBook Air?
Not on base M1 or M2 MacBook Airs, which support only one external display. Some newer base chips support two displays with the lid closed; check Apple’s specifications for your model.
Is 98W enough to charge my laptop?
For most laptops, yes. Very high-performance laptops that draw more than 100W under load may charge slowly or drain during heavy tasks.
Bottom line
The CalDigit TS4 is one of the most complete Thunderbolt 4 docks, with outstanding port selection, 2.5GbE and 98W charging. It is best for users with many peripherals and capable laptops. Confirm your laptop’s display support and check CalDigit’s current spec sheet and price before buying.
Ready to decide? Our #1 pick for 2026 is the Connection.
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