The Cavius CV2106 is a 10-year lithium battery powered optical smoke alarm with RF interlink connectivity. This wireless smoke alarm is ideal for indoor use and comes with a manufacturer warranty of 10 years. The unit includes the alarm and features radio frequency technology for added convenience. Perfect for enhancing your home security system, this smoke alarm from Cavius offers peace of mind knowing your home is protected against potential fires.PLEASE NOTE THESE HEAT HEADS HAVE BEEN ON THE SHELF FOR A WHILE, EVEN THOUGH THE BATTERY HAS NOT BEEN ACTIVATED IT DOES STATE THAT THEY ARE REPLACED AT THE END OF 2034.