Hearing aid that might good to your grannies

These are the kinds of hearing aids that I usually seen in some elderly here.Choosing this device is not based on thier prices but to the quality on the item itself.It needs to test for few days up to one month or more to be sure that each one of these are properly fit to the person who wants to use. I try all of these how it works, pretty amazing!
connect on tv - is strictly  for tv sets only, unbelievable ! you can hear everything while viewing any tv programs, products of GERMANY. I cant give any information of the manufacturer because  booklets do not have english translation.
a - is the latest model something like two way radio , it can be use in an open air or/and  in a groups of people near to whom has wearing it, fantastic! 
b - is a pair to use on "a" in far distance like around the house, it has volume to adjust how far the  "a".
c- is like an "a" that can be use on the first stage of hearing loss cases

 All has each special rechargeable batteries . Booklets are written in hebrew but there is illustration drawn on how to operate the device.