Comprehensively tested and designed to UL/ULC standards for safety and reliability, the alarm is powered by replaceable AA batteries (included) for continual detection even during outages. Plus, it’s self-testing and easy to install with the included twist-and-click mounting bracket. And it’s equipped with end-of-life notifications that will beep to remind you it’s time to replace it 10 years after it is powered. Power Source 2 AA battery operated Smoke Sensor Photoelectric Audio Alarm 85dB at 3m (10ft) Temperature Range 4.4˚C (40˚F) to 37.8˚C (100˚F) Humidity Range Up to 95% relative humidity (RH), non-condensing Warranty 10-Year Limited Warranty (batteries excluded) Replacement Batteries Energizer E91, Gold Peak 15A or Golden Power GLR6A. Replacement batteries are available where you purchased this alarm Cross Refefence i9040CA Note Do not use lithium batteries in this unit
