Features: Captures every detail of telephone conversations with crystal-clear clarity. Built-in LCD panel displays incoming & outgoing telephone numbers, . Information is stored on cassette & is displayed again upon reviewing the tape. Begins recording automatically when the phone is in use, or manually enabled. Slow speed mode permits 5 hours of recording with standard C-120 cassettes. Compatible with single- & multi-line phones. Equipped with an optional voice-control mode.