Have you ever had a pet that is not handling stressful situations too well? The right type of music could relax and calm your pet down. The PetPhone happens to be a MP3 player that relaxes your pet. It fits comfortably over your pet’s neck and eliminates extremely high sound frequencies (>20,000 Hz) disliked by dogs and cats. Its max volume is limited to 75 db. The device has a display that shows the music playing. Like what you see? You can get it for under $150.