Deluxe Folding Headphone - (Adult Size). The Deluxe Folding Headphone - Adult features folding earpieces and single cord with mono 3.5mm plug. This style headset is made to be worn by adults. These hard of hearing headphones work with any Williams Sound mono Receivers or Pocketalkers. A children's version is also available. Covered under a 90-day mfg. warranty.