an indicator of smoke. The device can confidently claim to be “smart”, since commutated with smartphone, that customized for the user’s requirements, and most importantly – do not mix fire with tobacco smoke. Fire alarms, designed to inform about the appearance of smoke in the room, can not distinguish between fire smoke from conventional tobacco smoke than create a lot of inconvenience. Engineers from the company Apple, seems to have solved this problem by creating an innovative light smoke Nest Protect. While the project is in the design stage, but tests of the prototype were impressive.