A Comm badge is a communication device used by the Police Department in 2048. The majority of Comm badges are a small circular shape, although Dr. Rudy Lomm has used a small rectangular sized one. They are designed to be worn on clothing.
The detectives in the Detective and Investigation unit, Captain Sandra Maldonado, Dorian and Dr. Rudy Lom all have been shown wearing comm badges during various investigations. The mobile phone model used by the PD is able to connect to these Comm badges and vice versa.