Siterwell GS888A Single Station Combo Smoke & CO Alarm

2-in-1 Protection: Equipped with a photoelectric smoke sensor and an electrochemical carbon monoxide sensor, it can detect smoke and dangerous carbon monoxide values at the same time. LCD Display: This CO detector has an easy-to-read LCD that shows alarm status and battery level. Replaceable Batteries: The carbon monoxide detector has a service life of up to 10 years, using 3 replaceable AA batteries, the battery life is up to 7 years, and the replacement is more flexible. Three Alarm Modes: 85DB buzzer, LCD, LED alarm. When a dangerous situation occurs, the buzzer will sound, the red indicator light will flash, and a warning will appear on the LCD screen. Silent Mode: When the smoke detector is in a low battery warning state, press the test button. The alarm will be silent for approximately 10 hours.