Compare prices for ViewSonic ViewSonic TD1655 Monitors

Overall, this works great as a portable second monitor for office use. I love the built-in stand and the dual USB-C ports for power delivery. The speakers actually sound better than my iPad's. Touch works well, but note that it doesn't work with iPad (iPadOS limitation) and requires a USB cable alongside HDMI—so if you want one-cable touch, you need USB-C.

Overall, this monitor works well as a second monitor for portable office use. I've tested it with both an iPad Air 5th Gen and an MS Surface Pro 7+. I prefer the built-in stand compared to other portable monitors with folding covers. The extra USB-C input for power delivery is a nice touch, and the speakers sound better than my iPad's native ones. The touchscreen is great but has limitations: it doesn't work with iPad (iOS limitation) and requires USB-C—HDMI alone won't work. If you want touch with a single cable, USB-C is the way to go.