OTTO Engineering One Wire Surveillance 14-Pin Connector Kit w/ In-Line Ergonomic PTT Black. The connector allows you to change only the earpiece to allow multiple users to use the same radio. This promotes hygiene and reduces wear and tear on radio connectors. Specifications for OTTO Engineering One Wire Surveillance 14-Pin Connector Kit w/ In-Line Ergonomic PTT: Manufacturer: OTTO Engineering Color: Black Package Contents: OTTO Engineering One Wire Surveillance 14-Pin Connector Kit w/ In-Line Ergonomic PTT OTTO Engineering E1-1W2KB131: One Wire Surveillance 14-Pin Connector Kit w/ In-Line Ergonomic PTT Black