The Olympus TP-8 Telephone Pick-Up combines a telephone pick-up, earphone and microphone in one small unit. IT's perfect for recording phone calls and suitable for most mobile phones. All you have to do is plug the TP-8 into the mic jack on your voice recorder and place the earphone into your ear. Although the TP-8 is ideal for cellular phones, it also works for land lines and DECT calling. For added comfort, small, medium and large size earpiece tips are included.