The Olympus TP-8 is perfect for recording phone conversations, such as interviews. When speaking on the telephone, the TP-8 will capture both sides of the conversation for recording by your voice recorder. The TP-8 replaces the TP-7 Telephone Recording Device. The TP-8 is recommended for both cellular phones and landline phones including DECT standards. Ear pieces in three different sizes (S/M/L) are included.