Abstract: A personal alarm apparatus comprises a wrist mounted R.F. transmitter including a push button trigger and a relay station connected to the telephone line. The relay station on receipt of the transmitted alarm signal dials the first of up to four stored telephone numbers and repeats a digitized vocal message. The relay station includes means for sensing a touch-tone on the line to cease the message and a ring-tone sensor for counting rings in a call-back before intercepting the call and further repeating the message.