X-Sense Mini Smoke Alarm - 3 Pack 10 Year Battery - Exp 2033 (1013)

#1013 Batteries Expire in 2033 10-Year Battery: Forget about battery changes as this alarm is equipped with a built-in lithium battery that lasts for 10 years Accurate with Fewer False Alarms: Reliably keeps you and your loved ones protected from smoke and fire; quickly detects smoke from smoldering fires thanks to advanced photoelectric sensors; low false alarm rate with air sampled 3 times every 10 seconds Fits Right In: Mini size alarm measuring just 3.1 × 1.9 in (78 × 48 mm) and with hidden mounting bracket; low-profile design makes it an unobtrusive addition to any home décor