WIZMART cigarette smoke alarm

An optical cigarette smoke detector is a special type of smoke alarm sensitive to cigarette smoke. It is installed in places where smoking is prohibited (schools, hospitals, offices, prisons and similar establishments). The detector is easy to install (special metal protective guards are available separately to prevent damage, theft and similar interference). Features include automatic self-testing, three sensitivity settings, two different audible alerts and an operating-status indicator. Powered by a 9V battery. Warranty: 3 years.