LenovoThinkPad Universal Thunderbolt 4 Dock, 4 Displays, Dynamic Power Charging up to 100W, Black

I bought this dock and used it to drive a display on a gaming-focused desktop at 1440p and 165hz over displayport. I also connected ethernet, keyboard, mouse, and speakers (via a 3.5mm jack) over a single thunderbolt 4 cable from the dock to my desktop PC into an ASUS ThunderboltEX 4 pcie card. I also used it at one point to drive the 1440p 165hz display and an additional 1080p 60hz display. I had no issues related to the dock at all.I am now using it in a music-focused workstation with a Dell XPS 15 laptop with thunderbolt 4. With the ports and power delivery, and the ability to drive high-bandwidth displays, I think it is comparable to the Caldigit Thunderbolt 4 dock that is almost twice as much money. Great device!

I have three displays attached and the docking station worked normally for the first four days. After that it started behaving:1) As I was working, one of the displays became completely white. The issue was resolved after turning the docking station off for 1 min and then on again.2) Three days later, after coming back from hibernation, only one of the monitors was activated (display #1). The other two stayed inactive, as if no signal was sent to them. To resolve the issue I had to power off the dock and then power it on again. Since then this issue repeats every one or two days.3) Two days ago glitches (moving lines in different colors) appeared on display #3. Again, to resolve I had to turn the dock off and then on.I have pretty good experience with Lenovo products so far and expected better performance from a docking station that costs over $200.

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I normally don't write reviews, however I had to do quite a bit of research before I landed on this one. Disclaimer towards all my views here, I bought this "Very Good" condition used on Amazon for around 140$ shipped. My attitude and rating reflect that price point.I am able to connect this to my Macbook, it charges my laptop and I am able to get two DISTINCT external screens. It took some fiddling to do this. I have two external monitors I use, a Samsung Neo G8 32inch 4k 240HZ and LG 27inch 4k 144Hz.My initial setup was to use this dock to power my mac and run the Neo G8 through the display port with a seperate thunderbolt input for the LG direct into the laptop via DP to TB cable. I was not able to get the Neo G8 to start up with either DP port on the dock. Neither the standalone nor the one that shares its chipset with the HDMI. I tried installing the DisplayLink drivers but it didn't recognize my monitors. I realized it may be my settings and permissions, but I'd have to weaken security too much through the kernel to do this just for DisplayLink. However, I found that the port was able to support DP to my LG monitor. So using DP to the LG, and then connecting my second monitor to the TB4 port on the dock via a DP to TB cable, I was able to get two distinct screens out of this. So before you go thinking that it doesn't work from one of the DP ports, check against another monitor. And use the DP port that's standalone (not stacked with HDMI) for testing, that one runs on a better chipset. Note that I believe that if you want to drive two screens on this, one of them must use the TB4 port. The others will all mirror each other if you're using a Mac.The Macbook works with this, but it doesn't play well. For my needs it's sufficient after passing the setup headache. Things I still have to watch it for. I use my dock with my laptop in clamshell mode, laptop lid closed. Sometimes it wont wake from sleep using my keyboard, meaning I have to open the laptop, login. Sometimes an additional step of replugging the port in is needed. The audio jack in the front works from single port mic and audio. It's well powered but dont plug your headphones in and out all the time when it's docked. The system has to re-register that there is an audio device present and sometimes it takes a bit.That all being said, I believe this is one of the better TB4 ports that you can make work with the Mac M1. If I had to spend 300$ on a dock, I'd probably go with Caldigit, more straight forward especially with everything having a thunderbolt converter cable these days. But for that price I could buy two of these at today's price.Best of luck.

So when I plug it into my Dell Latitude 5400 which has no Thunderbolt port, but does have a USB Type-C with DP Alt Mode port, it can run 1 monitor at 144Hz or 2 monitors at 60Hz (both 1080p). It can also run a monitor through a USB Type-C port on the dock using an adapter (whether to HDMI or DP). All the other USB ports and audio work. Ethernet port shows up as Realtek 1Gbps. When this laptop is charging from the dock, there is noisy interference in the audio from the dock as well (through the 3.5mm jack).When I plug my Dell G15 into it, which has a TB4 port, it can drive the monitors at high bandwidths (1080p 240Hz for HDMI, 1080p 360Hz through DP). For some reason, it does not work with monitors in the USB Type-C ports with adapters. I've ruled out my laptop being the issue here since it does work with the Type-C adapters on its own. The problem lies somewhere in using Thunderbolt 4 and on this specific laptop. The ethernet port shows up as Intel I225 and says it should do 2.5Gbps but never does. Only connects at 1Gbps. It does reliably transfer at that full gigabit speed however. I haven't tested the Realtek version yet.I also have that flickering someone else mentioned. Specifically through the HDMI port, when it's at high bandwidth (1080p 240Hz). Mine is a slight flicker of 1 pixel in height white line at the very top. It's hard to notice, but it's there. Didn't notice any flicker at 1080p 60Hz, but will keep an eye out.Overall very usable but those issues are disappointing.----UPDATE: So 2 years in, it won't work at 240Hz 1080p over HDMI at all anymore. I mean, it will work for a few minutes then the screen will begin blinking in and out at random intervals to the point where you can't get anything done and have to drop down to 144Hz 1080p which still works. When it was new (see above), 240Hz 1080p over HDMI worked, but had some weird flicker around the top edge only. Everything else is the same. I dropped my review from 3 stars to 2 stars.