CalDigit TS4 Thunderbolt 4 Dock Review
Simplify your workspace chaos with the CalDigit TS4 Thunderbolt 4 Dock. Experience 18 ports of connectivity bliss with 98W charging, all wrapped in witty prose.
Eighteen ports. Three Thunderbolt 4 downstream connections. Every USB port running at 10 Gbps. UHS-II card readers. 2.5 Gigabit Ethernet. Three audio ports. 98W charging. The CalDigit TS4 has more of everything than any other Thunderbolt 4 dock on this site. Where most docks make you choose between port count and port speed, the TS4 provides both. It is the dock that creative professionals, developers, and power users reference when they say they need a dock that handles every device on their desk without compromise.
Key Specifications
| Specification | Detail |
|---|---|
| Total Ports | 18 |
| Thunderbolt 4 Downstream | 3 (40 Gbps each) |
| USB Ports (10 Gbps) | 8 (mix of USB-A and USB-C) |
| DisplayPort 1.4 | 1 |
| SD 4.0 UHS-II | 1 |
| MicroSD 4.0 UHS-II | 1 |
| 2.5 Gigabit Ethernet | 1 (backward compatible with 1 GbE) |
| Audio Ports | 3 |
| Security Slot | 1 |
| Power Delivery | 98W |
| Data Transfer | 40 Gbps (Thunderbolt 4) |
| Display: Windows | Single 8K or dual 4K@60Hz |
| Display: Mac Pro/Max/Ultra (M1-M4) | Dual 6K@60Hz |
| Display: Mac Non-Pro (M1-M3) | Single display only |
| Display: Mac (Intel) | Dual displays supported |
| Compatible Systems | TB4, TB3, USB4, USB-C (with data/video/power). Mac M1-M4, Windows, Chrome OS, iPhone 15-16 Pro, iPads |
| Required Cable | Supplied TB4 cable or Intel Certified aftermarket cable |
| Weight | 1.4 lbs |
| Dimensions | 4.46″ L x 1.65″ W x 5.55″ H (vertical standing) |
| Manufacturer | CalDigit Inc. |
| Warranty | Not specified in Amazon data |
Three Thunderbolt 4 Downstream Ports
Most Thunderbolt 4 docks have one or two downstream TB4 ports. The CalDigit TS4 has three. Each runs at 40 Gbps. That means three high-speed Thunderbolt peripherals can connect simultaneously: a Thunderbolt SSD array, a Thunderbolt display, and another Thunderbolt device, all running at full bandwidth. Daisy-chaining extends this further. For video editors working with external Thunderbolt storage, photographers connected to Thunderbolt card readers, and developers running multiple high-speed peripherals, three TB4 ports is the difference between choosing which device to connect and connecting all of them.
Every USB Port at 10 Gbps
Eight USB ports, all at 10 Gbps. The Dell WD22TB4 has USB-A at 5 Gbps. The HP TB4 G4 has USB-A at 5 Gbps. The Lenovo ThinkPad TB4 has USB-A at 10 Gbps (matching CalDigit on this spec). But the CalDigit has eight 10 Gbps ports versus Lenovo’s four. If you connect multiple external drives, a high-speed scanner, and USB-C accessories, every port runs at full speed without bandwidth compromises.
Mac Display Matrix: Know Your Chip
The CalDigit TS4’s display support depends entirely on which Mac you own:
M1/M2/M3 Pro, M1/M2/M3/M4 Max, and M Ultra: dual 6K@60Hz. Two Apple Pro Display XDR-class monitors through one dock.
M4 Pro: dual 6K@60Hz (same as above).
M1/M2/M3 Non-Pro (MacBook Air, base MacBook Pro, base Mac Mini): single display only. This is Apple’s hardware limitation, not CalDigit’s. The dock cannot override the chip’s native display output restriction.
Intel Macs: dual displays supported.
Windows: single 8K or dual 4K@60Hz.
The M1-M3 Non-Pro single-display limitation is the most important detail for Mac buyers. If you own a MacBook Air M2 and expect dual monitors from this dock, it will not happen. The TS4 does not use DisplayLink to work around Apple’s limitation. It relies on native Thunderbolt display output. For Mac dual-display solutions on base M-series chips, DisplayLink docks like the StarTech.com hybrid or the Minisopuru DS808 serve that need. For USB-C display requirements, see our USB-C portable monitor guide.
UHS-II Card Readers
SD 4.0 and MicroSD 4.0 UHS-II readers. UHS-II cards transfer at up to 312 MB/s, three times faster than UHS-I (104 MB/s). The Kensington SD5000T5 also has UHS-II readers. Most other docks on this site have UHS-I or do not specify. For photographers and videographers working with UHS-II cards from professional cameras, the CalDigit reads them at full speed without a separate card reader.
2.5 Gigabit Ethernet
The 2.5 GbE port runs 2.5 times faster than standard Gigabit Ethernet. Backward compatible with 1 GbE networks. For users with 2.5 GbE routers, NAS devices, or office network infrastructure, the CalDigit takes full advantage of the faster network. Requires a Thunderbolt host connection for 2.5 GbE performance. The HP TB4 G4 and Kensington SD5000T5 also offer 2.5 GbE. The Dell WD22TB4 and Lenovo ThinkPad TB4 have standard Gigabit only.
Three Audio Ports
Three audio ports instead of one. Most docks have a single combo audio jack. The CalDigit provides separate connections for headphones, microphone, and line-level audio. For musicians, podcasters, and anyone who uses dedicated audio equipment rather than a USB headset, three audio ports eliminate the need for a separate audio interface for basic input/output tasks.
98W Charging
The TS4 delivers 98W to the laptop. That charges MacBook Air (30-45W) and MacBook Pro 14″ (70-96W) at full or near-full speed. MacBook Pro 16″ (140W) charges below full speed. For comparison, the Lenovo ThinkPad TB4 delivers 100W, the HP TB4 G4 delivers 100W, and the Kensington SD5000T5 delivers 140W. The CalDigit’s 98W is slightly below the 100W standard but sufficient for most laptops. Power supply and Thunderbolt 4 cable are included in the box.
Cable Requirement
The TS4 must be used with the supplied certified Thunderbolt 4 cable or an Intel Certified aftermarket cable. Generic USB-C cables may not provide full Thunderbolt 4 bandwidth and could limit performance. The supplied cable is included. If you need a longer cable, it must be Intel Certified for Thunderbolt/USB4.
Drawbacks
| Consideration | Detail |
|---|---|
| M1-M3 Non-Pro: Single Display | Base M-series Macs cannot get dual displays. No DisplayLink workaround. |
| 98W, Not 100W | Slightly below the 100W standard most TB4 docks deliver. |
| Cable Requirement | Must use supplied or Intel Certified cable. Generic cables may limit performance. |
| TB4 Required for Full Performance | TB3 and USB-C connections reduce capability. |
| Warranty Not Specified | Amazon data does not list warranty duration. |
| No HDMI | DisplayPort 1.4 only. HDMI monitors need an adapter. |
Who This Dock Is For
Creative professionals, developers, and power users who need the most ports, the fastest USB, and the broadest peripheral support from a Thunderbolt 4 dock: 18 ports. Three TB4 downstream at 40 Gbps each. Eight USB at 10 Gbps. UHS-II card readers. 2.5 GbE. Three audio ports. Dual 6K@60Hz on Mac Pro/Max/Ultra. The CalDigit TS4 provides more of everything at every speed tier. If your desk has more peripherals than any other dock can handle, the TS4 handles them all. For how it compares to enterprise TB4 docks, see the Lenovo ThinkPad Docking Station review.
Base M1-M3 Mac owners who need dual displays, or users who need HDMI: Single display only on non-Pro M-series Macs. DisplayPort only, no HDMI. For Mac dual-display solutions or HDMI output, see our docking stations hub page.
Final Verdict
The CalDigit TS4 is the most port-rich Thunderbolt 4 dock available. Eighteen ports with three TB4 downstream, eight 10 Gbps USB, UHS-II card readers, 2.5 GbE, three audio ports, and 98W charging. No other Thunderbolt 4 dock on this site matches the combination of port count, port speed, and peripheral variety. The vertical standing design at 1.4 lbs and 4.46″ x 1.65″ x 5.55″ keeps the desk footprint small despite the port count.
The M1-M3 Non-Pro single-display limitation, DisplayPort-only video (no HDMI), 98W instead of 100W, and the cable requirement are the honest trade-offs. For power users whose desk has more devices than any other dock can accommodate, the CalDigit TS4 is the dock that says yes to every peripheral you own.
Frequently Asked Questions
Will my MacBook Air M2 get dual monitors?
No. M1-M3 Non-Pro Macs are limited to a single display through this dock. This is Apple’s hardware limitation. The TS4 does not use DisplayLink. For dual displays on base M-series Macs, a DisplayLink dock is needed.
Why 98W instead of 100W?
CalDigit rates the TS4 at 98W power delivery. The practical difference from 100W is negligible. Most laptops that charge at 96W or less receive full-speed charging. Only laptops that draw exactly 99-100W would notice the 2W difference.
Can I use a regular USB-C cable?
CalDigit requires the supplied Thunderbolt 4 cable or an Intel Certified aftermarket cable. Generic USB-C cables may not support full 40 Gbps Thunderbolt bandwidth and could limit dock performance.
How does this compare to the Lenovo ThinkPad TB4?
CalDigit: 18 ports, 3 TB4 downstream, 8 USB at 10 Gbps, 2.5 GbE, UHS-II readers, 3 audio ports, 98W, no HDMI. Lenovo: 11 ports, 1 TB4 downstream, 4 USB-A at 10 Gbps, Gigabit Ethernet, no card readers, 1 audio port, HDMI 2.1, 100W. CalDigit has more ports and faster networking. Lenovo has HDMI 2.1 and vPro enterprise management.
Disclosure: As an Amazon Associate, I earn from qualifying purchases.
Docking Station Intelligence
The standards are confusing by design. These three panels decode what manufacturers won’t explain clearly. Applicable to every docking station.
The USB-C Confusion Matrix
The USB-C connector is the single greatest source of buyer confusion in docking stations. The physical plug looks identical whether it carries USB 2.0 at 480 Mbps or Thunderbolt 5 at 120 Gbps — a 250x difference in capability hidden behind the same shape. Manufacturers exploit this by labeling everything "USB-C compatible" without specifying which protocol runs through it. Two docks can look identical on the outside and behave completely differently once you plug them in.
The hierarchy matters because it determines everything: how many monitors your dock can drive, how fast files transfer, whether your laptop charges while docked, and whether you need third-party drivers. Here is the real capability ladder, from slowest to fastest:
The practical takeaway: if your laptop has Thunderbolt 4, buy a Thunderbolt dock. If it only has generic USB-C, verify whether it supports DisplayPort Alt Mode before buying anything with multi-monitor claims. Our buying guide walks through verification steps for every major laptop brand.
Power Delivery: What the Watts Mean
Power Delivery (PD) determines whether your docking station can charge your laptop while you work, or whether you need a separate charger cluttering your desk. The math is simple but rarely explained: your laptop draws a specific wattage under load, and the dock must match or exceed it. If the dock delivers less than your laptop needs, the battery slowly drains even while plugged in — defeating the purpose of a docking station entirely.
Most ultrabooks need 45–65W. Standard business laptops need 65–100W. Gaming and workstation laptops can demand 100–140W or more. The dock’s advertised PD wattage is the maximum it can deliver to your laptop — but this drops if you charge other devices (phones, tablets) through the dock simultaneously. Always leave a 15–20W margin above your laptop’s requirement.
Check your laptop’s original charger wattage — that’s your baseline. Our FAQ covers how to find this for every major brand.
Native Display vs DisplayLink: The Hidden Factor
This is the decision most buyers don’t know they’re making. When a docking station outputs video to your monitors, it uses one of two fundamentally different methods: native (the dock passes your laptop’s GPU signal directly to the monitor) or DisplayLink (the dock compresses video over USB and a software driver renders it). The difference is invisible in marketing materials but profoundly affects your daily experience.
Native output through DisplayPort Alt Mode or Thunderbolt uses your laptop’s actual graphics hardware. There is zero added latency, full DRM support for streaming services, no CPU overhead, and no driver to install. DisplayLink, by contrast, adds 5–15ms of latency (noticeable in video calls and cursor movement), blocks DRM content on connected monitors (Netflix, Disney+ show black screens), consumes 3–8% of your CPU constantly, and requires a driver that Apple’s macOS security updates occasionally break.
DisplayLink exists for one reason: Apple Silicon base chips (M1, M2, M3) can only drive one external display natively. If you need two or more monitors on a base MacBook Air or 13” MacBook Pro, DisplayLink is your only option. For everyone else — Windows users, Mac Pro/Max chip users, Intel/AMD laptops — native is always the better choice.
Native (Alt Mode / Thunderbolt)
DisplayLink (USB compression)
The bottom line: if your laptop supports native multi-display output, always choose a native dock. DisplayLink is a workaround, not an upgrade. See our glossary for detailed definitions.
COMMAND CENTERCOMMAND CENTER
Six tools that decode the confusion manufacturers create. Port protocols, power budgets, display configurations, compatibility, desk planning, and future-proofing. Full buying guide →
Port Protocol DecoderWhat does your connection type actually support? Glossary
Power Delivery CalculatorCan this dock keep your laptop charged?
Display Configuration PlannerCan your dock push enough pixels?
Laptop-to-Dock CompatibilityWill this dock work with YOUR laptop?
Desk Setup ArchitectWhat ports do you actually need?
Select everything you need to connect: