Lenovo ThinkVision 23.8" Monitor - Manual (Page 23)

Chapter 2.
2-11
Step 4: Attach the mounting bracket from the VESA compatible wall mounting kit
(100mm x100mm distance), the type of VESA mounting screw is M4 x 10 mm.
Step 5: Attach the LCD display to the wall, and follow the instructions in the wall-mounting
kit.
For use only with UL Listed Wall Mount Bracket with minimum weight/load: 8kg
Note: When you use a flexible arm, do not tilt the monitor downward by more than 5 degrees.
VESA hole