I did a quick search and cam up with some info on these products.  I have an old home with a ton of smoke alarms in them but cannot hear the basement alarm on the second floor.  Anyone have one of these.  Any alarm work better then the other??
here is one from ace
(broken link removed)
thanks
	
		
			
		
		
	
				
			here is one from ace
(broken link removed)
thanks
 
	 
	 
 
		 
 
		