Tera 4GB Multi-functional Digital Audio Voice Telephone Sound Recorder Recording Device Dictaphone MP3 Players for Meetings Conferences Lectures Classes Silver Connect the recorder with the telephone via phone adapter allows for recording telephone conversation Back light LCD display save much battery and notify you the battery status Support USB ability to upload or download the audio file to PC High sensitivity built-in or external microphone expand the scope of recording Two recording modes: "SP" for high quality recording voice without distorting. "LP" for long time recording