Earmor Tactical PTT 3.5MM AUX Radio Application Black M51-AUX. Button activated PTT (push to talk) unit can be clipped on clothing or belts. Specifications for Earmor Tactical PTT 3.5MM AUX Radio Application: Manufacturer: Earmor Color: Tactical Black Fabric/Material: Polymer/Steel Weight: 83 g Features of Earmor Tactical PTT 3.5MM AUX Radio Application Anti-pull design Super tough steel back clip Ergonomic design TP120 plug compatible with military standard NATO standard plug Customizable connectors based on customer's intercom model Package Contents: Earmor Tactical PTT 3.5MM AUX Radio Application Earmor M51-AUX: Tactical PTT 3.5MM AUX Radio Application Black