Patent ID: 8232884

Claim:
A detection device comprising: a housing; a first detector device configured to detect at least one smoke particle; a second detector device configured to detect at least one gas particle, wherein said first detector device and said second detector device are substantially enclosed in said housing; an audible enunciator configured to emit a first audible sound when said first detector device detects at least one smoke particle, and a second audible sound when said second detector device detects at least one gas particle; a test button, wherein said audible enunciator emits a third audible sound when said detection device is operating improperly and said test button is actuated; a receptacle configured to receive a conductor that communicatively connects the detection device with a second detection device, wherein signals corresponding to said first and second audible sounds are communicated to said second detector, while a signal corresponding to said third audible sound is not communicated to said second detector; and wherein said first audible sound, second audible sound and third audible sound each differ.