Abstract: A combination electrical connector and power failure signal device, comprising a generally box-like housing having a front, a back and a chamber, a male electrical plug on the back, a female electrical plug on the front, an electrical circuit in the housing including conductors connecting the male plug to the female plug, an alarm circuit in the housing responsive to power in the electrical circuit maintaining a stand by condition, the alarm circuit including a sensor for sensing a failure of power in the electrical circuit and initiating a first alarm mode, and responsive to a predetermined time in the first alarm mode to terminate the first alarm mode and initiate a second alarm mode, and a battery for powering the alarm circuit during failure of power in the electrical circuit.