SAFE PARENTAL HEADPHONES – Includes two pairs of medical grade reusable skin-safe silicone adhesive to attach to your womb, adjust them based on baby's position. WIPE THE ADHESIVES WITH A WET FINGER TO RESTORE THE STICKINESS. Pixie adhesives will not leave any residue on skin and last several weeks. Use the included stereo audio splitter so mom or dad can simultaneously listen to what is being played to your baby.