The HATIS Director is suitable for those with moderate to profound hearing loss who have t-coil hearing aids. It wraps around the back of the head, and can be discreetly worn at home or in the office. Use with virtually all cellphones, cordless and landlines phones as well as digital hearing aids with t-coils. The HATIS Director has a solid cable connection, which means no loose connections and greater sound quality. This product comes with a six month warranty.