NIGHTHAWK CARBON MONOXIDE ALARMBATTERY OPERATED (107540)

Battery operated (3AAs included)
Red LED illuminates when in alarm mode – Green LED illuminates when DC power is present, normal operation
TestReset Button tests the unit for proper operation, resets the Carbon Monoxide alarm
7-year end-of-life warning alerts user to replace CO alarm after 7 years of operation (40% longer than other CO alarms)
7-YEAR LIMITED WARRANTY