Constant false alarms in the middle of the day. And then when one presses the "Hush" feature it runs through a variety of smoke and carbon monoxide alarm demos before it shuts up. Then, the other night at 2:45 am I get "SCREEEECH SCREECCH LOW BATTERY!!!! LOW BATTERY!!!" and it would not quiet and even after tearing the POS out of the wall it still would not shut up, so I had to wrap it in a towel and stick it in the fridge to get some sleep. I called their customer service and got an obnoxiously rude woman named "Heather" who was little to no help. Something that is supposed to save lives should not be so faulty.