A:AnswerThe jack pictured plugs into a recording device which is not included. You would use any recording device with a standard headphone jack. You place the ear piece in your ear and your phone against the ear piece. The ear piece has a mic on it to pick up the phone call and the speaker fits in your ear so you can hear through it.
A:AnswerNo, it was meant to use with voice recorder. You place the microphone in your ear while talking on a phone closed to your ear. The other end goes to the recorder's mic input.
