You want to move your portable monitor farther from your laptop, but the cable won’t reach.
We tried our 15m CABLETIME USB-C active optical cable, CT-ACMU4-ZB15 with two portable monitors: the Dell P1424H and ASUS ZenScreen Touch MB16AMT. Both worked at 1080p, 60Hz. With the ASUS, we could also use the touch screen and play sound through its speakers.
What worked over the 15m cable
We connected each monitor separately to a Windows ThinkPad, using the CABLETIME cable in place of a short USB-C lead.
| Monitor | Picture | Other functions checked |
| Dell P1424H | 1920 × 1080 at 60Hz; worked normally | Display connection |
| ASUS ZenScreen Touch MB16AMT | 1920 × 1080 at 60Hz; worked normally | Windows touch and built-in speakers worked normally |
The Dell P1424H worked with just the USB-C cable between it and the laptop. We didn’t connect a separate monitor power adapter. Dell supplies this screen with a 1m USB-C cable, so our test gives owners a specific longer replacement to consider. Dell P1424H specifications.
The Dell P1424H connected through our 15m cable. Windows shows 1920 × 1080 at 60Hz for both desktop and active signal modes.
With the ASUS MB16AMT, we checked more than the picture. We operated Windows from the touch screen and used the monitor’s speakers over the same connection. That matters if you use the screen to select items or navigate an interface: you can keep doing that at the screen instead of reaching back to the laptop.
The ASUS also had no separate power adapter connected. It has a built-in battery, though, and we didn’t log its charge level or charging behavior. We can confirm the picture, touch and sound worked; we can’t say the laptop alone powered it throughout the test.
The ASUS MB16AMT running at 1080p60. We also checked touch operation and speaker playback.
Illustrative 15m USB-C cable connection, separate from our portable-monitor test photos.
Why choose this CABLETIME cable?
A longer cable gives you more choice about where the screen goes. You could keep your laptop beside you while a customer sees the display across a counter, or put instructions beside a workbench while the laptop stays at your operating position. During training, a colleague could have the screen closer to their task.
The ASUS touch result makes that separation useful for interaction as well as viewing. If someone needs to select an item on the screen, they can do it there. Our connection carried the picture, touch input and speaker audio without an HDMI adapter or an extra touch cable.
The CT-ACMU4-ZB15 is a full-function USB-C-to-USB-C active optical cable, using a hybrid fiber-and-copper construction to carry video, USB data and power over the long connection. We connected it directly between the ThinkPad and each monitor. The Dell needed no additional monitor power connection; for the ASUS, allow for its internal battery when planning power.
The cable is rated for up to 8K60 with compatible equipment and comes with a two-year warranty. Both screens in this test are Full HD models, so the result to look at here is 1080p60 and the functions we checked. The product page lists the available lengths and operating modes.
Choosing a longer cable for your screen
You may only need a little more reach. In a Linus Tech Tips discussion, an owner found the supplied cable too short for a monitor stand, but a replacement 2m cable supplied power without a picture. Another portable-monitor owner on Reddit needed at least 3m to reach a PC across the room.
Those are good reasons to check the cable’s functions as well as its length. Not every USB-C cable carries video, and a touch screen needs a USB data connection too. Measure the route around your furniture or workspace, then choose a length that fits. Our 15m test is useful when you need that reach; a nearby stand may need a much shorter lead.
We plugged the end marked Source into the ThinkPad and Display into the monitor. To use this setup, your computer needs a USB-C port with DisplayPort Alt Mode video output, and your monitor needs a USB-C video input:
Computer → Source end → CABLETIME cable → Display end → monitor
Display connects to the monitor; Source connects to the computer.
You can select duplicate or extend in Windows. For ASUS speaker playback, select the monitor as the audio output. Keep the ASUS battery charged or follow its power guidance, and make sure the computer can supply enough power for a bus-powered screen such as the Dell.
The 15m version supports up to 40W USB Power Delivery with compatible equipment. That is the cable’s limit, not a power measurement from this test. Power travels from Source to Display; use a separate connection to charge the laptop if needed.
If your Dell P1424H or ASUS MB16AMT setup calls for a 15m route, the CT-ACMU4-ZB15 is the cable we used. It gives you a tested option for these monitors, with the port and power conditions above.
About our test: We connected one external screen at a time. We used the full 15m cable on a bench with the spare length coiled beside the equipment, rather than laying it out across a room. We did not measure power consumption or record a continuous-running test duration.
