Phone recording devices for landlines are covert audio listening devices designed to automatically record telephone conversations that are made from your phone in your absence.
The phone recording device for covert listening switches on and starts working by picking up the handset discretely records a conversation between both parties and is switching off by hanging up the handset. All conversations between both parties will be recorded, regardless of whether they were called from your phone or your phone was called. The hidden recording is performed on the internal memory of the recording device for the landline, and listening to the recorded material is done by connecting the recorder device to a computer.