Distinguishing itself as an elite brand, FIRST ALERT is pioneering the next iteration of their ultra-efficient line of photoelectric smoke alarms. Intuitive design and great technology have elevated the 10 years Series as the great option to utilize in the protection for what matters most in life. The P910 smoke alarm features an unprecedented ten year lifespan that complies with the current 10 years legislation. A leap in technology has eliminated the need to ever power or charge this unit with batteries. An end of life signal will readily alert owners once the unit has reached its 10 years capacity.