LG StanbyME 27" Rollable Touch Screen
 
Wireless design, endless possibilities.
A built-in battery lets you use StanbyME wirelessly, so you can place it wherever you need. The battery lasts for up to 3 hours on a single charge—enough for a movie, a workout, or even a study session.

https://www.lg.com/hk_en/lifestyle-screens/stanbyme/27art10akpl/