Asus ZenScreen MB166B 15.6" Portable Monitor - Manual (Page 14)

2-3 Chapter 2: Setup
2.3 DisplayWidget Lite software
Please go to ASUS official website www.asus.com and search MB166B,
enter product page and find “Support” tab on product page, then choose
“Driver &Tools”. By choosing Windows OS, you will see DisplayWidget Lite
software listed. Please download and install this software to enable “auto
rotation” and “contrast adjustments”.
*this software supports auto rotation and contrast adjustments only, all the
other functions on the software will be grey out.