THIS IS A 120VOLT SMOKE DETECTOR,  LIKE THE SA379UL, BUTIS MORE OF A                                                                                                                                    
COMMERCIAL GRADE  AS THE BATTERY DRAWER IS BEHIND THE MOUNTING BEZEL                                                                                                                                    
AND THEREFORE MORE TAMPER PROOF, REISDENTIAL EQUIVALENT IS THE SA379                                                                                                                                    
MODEL,WITH A SIDE MOUNT BATTERY. YOU SHOULD REPLACE THEM ALL, AS THEY                                                                                                                                   
SHOULD HAVE DIED 5 YEARS AGO, THEY WILL DIE, YOUR LIFE, MOST GO WITH                                                                                                                                    
THE SA379 UNITS                                                                                                                                                                                         

                                                                                                                                                                                                   
        1-*       0+                                                                                                                                                                                    
$C     24.71   23.76                                                                                                                                                                                    
$US    23.97   23.05                                                                                                                                                                                    
EURO   16.06   15.44