are you looking for the response type? (like "i've fallen and i can't get up").
if so lifeline worked well for a family member-it was set up with her local hospital which would have been where she would have been transported in an emergency so they had all her medical records on hand and were aware of all her medical issues (and allergies).
there was a transmittor in her living room that she could use, that also served as a two way radio-she also had the necklace thing she could use if she was away from the master unit (it had a button that would activate the master unit to send a call to lifeline). if the person lived in a larger living space it would probably be advisable to get more than one master unit, but in the case of a one bedroom apartment, if the door to the bedroom or bathroom were open and the necklace control was activated the transmittor both sent and received sound fine (and if a person activated but did'nt respond when lifeline tried to contact them, it was an immediate 911 response).
charge was'nt much per month-and if you check with the hospital the person uses (if it's local to them) they may have a rep. in house (when we returned the equipment it was to the local hospital).