3Com TRGpro - Manual (Page 15)

Chapter 1 Page 7
Protective flip cover
The cover protects the TRGpro handheld computer screen when it is
not in use and helps reduce glare while you use your handheld
computer. You can open the cover so that it is at an angle, open it fully,
or remove it altogether by pulling the cover out of the holes on the
sides of the handheld computer. To reattach the cover, reinsert the
pegs in the holes.