Abstract: An alarm device comprises a wrist watch which includes timing and alarm setting elements with a separate alarm box containing a sensor and sonic generator alarm. When the alarm feature is to be used, the watch is mounted in the alarm box and at the time of alarm, the wristwatch provides electrically generated alarm coupling signals which are detected by the remote sensor to activate the sonic generator alarm. The electrically generated coupling signals may be RF, magnetic or optical. Since the sonic generator and associated power supply of the alarm are mounted in the alarm box, rather than in the watch, the alarm watch may be styled to provide an aesthetically attractive watch which is thin and of suitably small dimensions.