The CalDigit TS4 is one of the most popular Thunderbolt docks for turning a laptop into a full desktop setup with a single cable. It’s expensive compared with USB-C hubs, so the key question is whether you actually need what it offers. This review breaks down its strengths, limits and the cheaper alternatives that may be enough.
Verdict
Buy it if you connect many devices (external drives, wired Ethernet, audio, card reader, displays) and want strong laptop charging and fast data through one cable. Skip it if your monitor already has a USB-C hub with charging, or you only need a couple of extra ports — a cheaper hub will do.
Key specs
| Connection | Thunderbolt 4 (compatible with Thunderbolt 3 and USB4; works with USB-C hosts at reduced capability) |
| Ports | 18 in total, including downstream Thunderbolt ports, 10 Gbps USB-A and USB-C, DisplayPort, SD and microSD card readers, and audio jacks |
| Charging | Up to 98 W to the laptop |
| Networking | 2.5 Gigabit Ethernet |
| Design | Aluminum, vertical or horizontal placement |
What it does well
- Everything through one cable: display, charging, network, storage and peripherals.
- 98 W charging covers most 13–16-inch laptops in normal use.
- 2.5 GbE is faster than typical gigabit adapters — useful for NAS transfers and large downloads.
- Thunderbolt downstream ports let you chain fast SSDs, another dock or Thunderbolt displays.
- Reliability: CalDigit docks have a strong reputation for stable connections with Macs and Windows laptops.
Limitations to know
- Display count depends on your computer, not the dock. Base Apple M-series Macs support fewer external displays than Pro/Max chips; the TS4 can’t bypass that. Check your laptop’s limit before planning a dual-monitor setup.
- Price. You pay for Thunderbolt bandwidth, build quality and port count.
- Power brick. It needs its own external power supply, which takes space under the desk.
- Newer docks exist. Thunderbolt 5 docks offer more bandwidth for high-refresh multi-monitor setups, at higher prices.
Do you need a dock at all?
| Your situation | What to buy |
|---|---|
| One monitor with USB-C charging, few accessories | Nothing extra — use the monitor’s hub |
| Laptop + keyboard, mouse and one drive | A compact USB-C hub |
| Many devices, Ethernet, card reader, fast storage | CalDigit TS4 |
| Mostly need more Thunderbolt ports | CalDigit Element Hub |
| High-refresh multi-monitor setup on a supported laptop | A Thunderbolt 5 dock |
Setup tips
- Use the short Thunderbolt cable included; long passive USB-C cables can reduce speed or charging.
- Connect monitors to the dock’s DisplayPort or Thunderbolt ports according to your laptop’s display support.
- Place the dock under or behind the desk with a cable tray for a clean one-cable setup.
- Keep the dock’s firmware up to date using the manufacturer’s utility.
Bottom line
The TS4 is an excellent, reliable Thunderbolt dock for power users who want a true single-cable desk. If your needs are simpler, a monitor with USB-C charging or a smaller hub delivers most of the convenience for far less money. For the rest of the setup, see our developer desk guide.