12-Hour Line Activated (No Battery Drain) Cassette Telephone Recorder for single line phones. (6 hours unattended per tape side) Simply plug in the ATR-12 to any standard modular phone jack, place unit in record and that's it! All your important calls from any extension will be automatically recorded.

Recorder turns on only when phone is in use, so batteries last for a full 24 hours of recording, even if it takes weeks. The ATR-12 comes complete with modular telephone cable, duplex adapter, AC wall adapter, and D-140 "instant start" leaderless standard cassette.