Be careful of, perhaps well meaning, organizations that overcharge for emergency telephone dialers. I don't think they should charge more than Radio Shack. Radio Shack sells an "Emergency Dialer System," #61-2659 (if they haven't changed it), for $99.99. Additional pendants, #61-2662, are (i.e., were, last I looked) 19.99 each. Radio Shack sells lots of "security" stuff which is not useful for emergency help; so you may have to tell the salesperson exactly what you want, and #61-2659 seems like it might be quite good. I did not get one because I don't think I need one yet, but those interested may want to look into this Radio Shack product. Bruce