1.Conform to EN50291 and EN14604 standard. 2.Nemoto/Sixth sensor Co sensor 3.Photoelectric smoke chamber. 4.Loud 85dB alarm ·Detect the CO and smoke. ·Operate by 9VDC battery.·Conform to EN50291 and EN14604 standard.·Test button for easy recommended monthly testing. ·Low battery signal.·Safety clip feature, not allow mounting of smoke alarm without battery installed ·Photoelectric smoke chamber. ...