Cordless Phone for Sight & Hearing Impaired Seniors This phone will deliver greater amplification, clarity, features and ease of use than ever before. It has been designed to maximize the user’s ability to HEAR and SEE the phone ring, enhancing their ability to communicate comfortably with family, friends and colleagues. If you or a loved one is hard of hearing then this is the cordless phone you have been waiting for. This phone is compatible with multiple handsets. Add up to 5 cordless handsets (PRO10HS) to the system.