Olympus Digital Headset 50-20000Hz with 2.5mm/3.5mm Plug Input 3.5mm Jack Output Ref TP-7

Plugs into the ‘MIC’ jack of a recorder. When talking on the telephone, the TP-7 will capture both sides of the conversation on a voice recorder. Frequency is 50 - 20,000 Hz. Plugs into a 3.5mm monaural jack and comes with two plug adaptors to convert either to a 3.5mm stereo plug or a 2.5mm monaural plug.