Familiar mechanical sounds to promote sleep!
Add more sounds to your Sound Oasis Sound Therapy System for added variety.
Contains 6, authentic, digitally recorded sounds.
Includes the following 6 sounds: Fan; Night Train; Country Highway; Interior of Airplane; Air Conditioner; Vacuum Cleaner.
Simply insert into the Sound Card slot on the Sound Oasis S-550-03 model.
Does not fit other Sound Oasis models.