I am not so sure, that the developent in the mobile app sector could outdate this device overnight. Why paying $139,00 for a device when one might easily download an app on your mobile phone which you could take everywhere instead of a 600 ft range?
This is for landlines and older people. So your going to give your grandmother some kind of phone she is clueless with and tell her to leave it out of the shower/bathtub where most elderly falls occur. You must be one mean sob? This requires a land line, which costs about $20 a month.