If you have an old Android tablet, or a new foldable phone, why not turn it into a portable monitor? Here's how I've done it.

You can take an old Android tablet and use it as a monitor, and it's surprisingly easy.

Connecting the Android Tablet and Windows PC with a Wired Connection You can also use your Android tablet as a second display for your Windows PC using a wired connection.

Sharing your Android phone or tablet’s display to another screen is really convenient with the Cast option available on most Android skins.

The Dasung Not-eReader 133 is an Android tablet that can also function as an E ink monitor. It has a high-contrast 13.3-inch E Ink Carta 1250 display and 2200 x 1650 pixels resolution.