This is one of the two ultra-high frequency voice transmitters/receivers flown on the Gemini VIII mission. This equipment provided line-of-sight voice communications between the astronauts and the ground. A high frequency voice transmitter/receiver provided beyond line-of-sight voice communication between the astronauts and the ground. Astronauts Walter Schirra, Jr. and Thomas Stafford flew the three-day Gemini VIII mission in December 1965. Collins Radio made this artifact and NASA transferred it to NASM in 1971.
This object is not on display at the National Air and Space Museum. It is either on loan or in storage.