Specifications include, but are not limited to: 10-YEAR SEALED BATTERY IONIZATION SMOKE ALARM & DETECTOR MEETS CALIFORNIA 10 YEAR ALARM REQUIREMENTS AND FEATURES: -IONIZATION SENSOR HELPS DETECT FAST FLAMING FIRES. -THE TEN YEAR SEALED BATTERY NEVER NEEDS TO BE CHANGED FOR THE LIFE OF THE ALARM. -TAMPERPROOF, SEALED ALARM DESIGN, CONSTANT PROTECTION SINCE BATTERY CANNOT BE REMOVED. -MEETS CODE FOR SEALED/TAMPERPROOF ALARMS -MUTE BUTTON MUTES UNNECESSARY ALARMS IMMEDIATELY. ALSO TESTS ALARM FUNCTION. -EASY INSTALLATION, INCLUDES EASY TWIST MOUNT AND HARDWARE. -POWERFUL LED AND ALARM INDICATOR. -LOUD 85DB ALARM. -END OF LIFE WARNING NOTIFIES YOU WHEN THE ALARM NEEDS TO BE REPLACED. -10-YEAR LIMITED WARRANTY - SMOKE ALARMS SHOULD BE REPLACED EVERY 10 YEARS FOR MAXIMUM PROTECTION. -MEETS UL217 STANDARD. -EMITS T3 PATTERN. -SAME FEATURES AS SA340CN AND SA340B BUT ADDS SEALED BATTERY TECHNOLOGY.