The image displays an old telephone call recorder from the Joytel brand (Model GT-TR600B), designed to automatically record calls via the phone line with a speed control feature to double the recording time. Device Type: Two-Way Telephone Recorder that works with mini cassette tapes. Prominent Features: Speed Control system to extend recording time, and automatic operation when the handset is lifted. If you wish to know how to connect it to the phone line or assess its historical value as an antique piece