Doctor-show device (5)
I believe the answer is:
pager
(Other definitions for pager that I've seen before include "communicator?" , "message on this?" , "Bleeper device" , "Contact device" , "Electronic alerting device" .)
I believe the answer is:
pager
(Other definitions for pager that I've seen before include "communicator?" , "message on this?" , "Bleeper device" , "Contact device" , "Electronic alerting device" .)