OM System TP8 Telephone RecorderTP8 Telephone Recorder Close Speaking Microphone Inner Ear system, suitable for mobile phones and Digital Voice Recorders. To use; plug the TP8 into the microphone jack on the DVR. Place the earphone into the ear, set the DVR into record mode; place the phone handset across the same ear to allow both voices to be recorded. The TP8 can also be used as a "close speaking" microphone (when plugged into the microphone jack on the DVR).