This smoke alarm is a “stand-alone" smoke alarm designed for private residences, spaces used for residential purposes, motorhomes, and travel trailers. Smoke alarms are not capable of preventing fires from starting or extinguishing fires. They are designed to warn you in time of the deadly smoke produced during a fire and to give you the time you need to escape. SENSOR TYPE The Cautiex smoke alarm is a photoelectric smoke alarm based on infrared technology. It does not use radioactivity to detect smoke. The Cautiex smoke alarm cannot detect heat or fire. To reliably detect smoke, the smoke must be able to reach the sensor chamber of the Cautiex smoke alarm. BATTERY TYPE - CR2 3V lithium battery / 850 mAh (replaceable) https://elecena.pl/product/18544803/106525-design-mini-smoke-detector-five-year-battery-en14604 2021-05-22 https://elecena.pl/product/18544803/106525-design-mini-smoke-detector-five-year-battery-en14604 2026-07-12