mode or the standby mode to reduce electric power consumption a test key utilized for testing the battery and normal circuit operation and a temperature switch key i e when the two temperature sensors 20 and 21 are normally set to a temperature lower than 28 u00b0 c to initialize sensing operation after the temperature switch key is pressed the aforesaid set temperature is automatically switched to 26 u00b0 c utilized to switch the temperature settings of the temperature sensors 20 and 21 and a number of time selector keys includes selector keys for the relatively brief durations of 20 minutes and 30 minutes as well as selector keys for longer durations of one hour two hours and three hours such that after pressing the desired selector key the aforesaid cpu is automatically activated when the period set by the time selector key is reached utilized to control the microprocessor cpu from the standby mode to the active mode and furthermore the aforesaid cpu is software controlled and is normally in the standby mode but when the time selector key is pressed down and furthermore after the period set by the aforesaid key is reached operation commences such that when the two temperature sensors 20 and 21 detect a temperature that is lower than the preset 28 u00b0 c or 26 u00b0 c or when the other temperature sensor 22 detects a temperature that is higher than 37 5 u00b0 c the readings will automatically invoke the generation of electromagnetic waves through the wireless triggering circuit and furthermore through the aforesaid conductor f positioned in the guide slot 107 of the belt pack 10 a receiver 40 that is independently located at the side of the person looking.