The DH77 headcomm was a communications device for troopers developed by Soro-Suub. It was issued to hundreds of thousands of Imperial Army troopers before it was realized particle emissions (such as TIE Fighter exhaust) could easily jam them. They were largely replaced with the DH107 headcomm.

SourcesEdit

• Imperial Sourcebook
• The Essential Guide to Weapons and Technology
• The Official Star Wars Fact File 24 (COM2, Comlinks)