10-YEAR LITHIUM POWER 10 years of continuous protection under normal operating conditions. No battery change required. Provides audible notice when alarm has reached its end of life. TAMPERPROOF SEALED ALARM Powercell cannot be removed. PHOTO/ION SENSORS Dual Photoelectric & Ionization sensing technologies for optimal sensing of smoke particles produced in both flaming and smoldering fires. SILENCE FEATURE Silences nuisance alarms. TAMPER RESISTANT Locks alarm to mounting bracket. Perfect for apartment, dormitory or hotel applications. END OF LIFE SIGNAL Provides audible notice when alarm needs to be replaced after 10 years.
