Adapter to record both sides of a landline telephone conversation from a corded handset into most audio recorders and USB sound cards. Not compatible with cordless phones.
Adapter to record both sides of a conversation using a landline telephone with a RJ9 connected removable corded handset
Noise Canceling Monaural Headset with 2 Meter Cable and In-Line Volume Control
Noise Canceling Monaural Headset with 2 Meter Cable for mobile devices and computers with a combo jack