LEMO

Name of a Swiss company that makes a push-pull electric and fibre connectors that go by the same name. lemo.com

Commonly found on RF bodypacks, in a 1, 3, or 4 pin configuration. Countryman has a nice table listing each connection.

They have many applications, but the signature features of these types of connections are precision contacts and easy mating and disconnection.

Useful links:

• LEMO Plug Identification Guide (PDF)
  
• LEMO Receptacle Identification Guide (PDF)
  
• LEMO Catalogs