Crew Remote Unit, for wireless communications with crewmembers or Mission Control while inside the cabin.
Machined aluminum housing enclosing circuit cards and wiring.
Controls include Push-To-Talk (PTT) buttons to transmit to Mission Control (XMIT), or for intercom to crewmembers (ICOM), with several channels available for selection.
Made by GTE Government Systems, part number 02-1388200, NASA part number SED16102306-611.
NASA photo shows astronaut Fred Leslie using this type of Crew Remote Unit in Spacelab during the STS-73 mission.
