An alarm system includes an alarm signalling device having a transceiver for transmitting an alarm signal. The system includes a responder device for receiving the alarm signal, the responder device having a device for signalling an alarm. The alarm signalling device includes an interface for receiving user information and an activating device for activating the transceiver to transmit the alarm signal in response to the user information. The transceiver device further includes a device for receiving a response signal from the responder device.