The Dräger C-C400 is a simple push-to-talk button which connects the upper units to multiple radio devices- The large pressure area enables secure voice transmission in any situation, even when the C-C400 isoperated via the equipment or worn under protective clothing- The C-C400 has been designed to be particularly sturdy and robust for many different applications as well asbeing water-repellant (IP55)- The slim design prevents accidental use and enables direct adaptation on the radio device.