1. A detector comprising: a sensor; control circuitry coupled to the sensor; voice recognition circuitry coupled to the control circuitry in response to at least one verbal command recognized by the recognition circuitry, the control circuitry initiates one of a selected non-test function or a test; an output device, coupled to the control circuitry which indicates a test result; and a housing which contains the sensor, the circuitry and the output device.