Born Ann-Margaret Olsson in Stockholm, Sweden on April 28, 1941, the redhead who would one day be known simply as Ann-Margret spent the first five years of her life in her native country before her electrician father was offered a job in stateside.
The one exception is if it you only hear your carbon monoxide detector beeping every minute or two, which could be a low-battery warning signal. In those cases, you should immediately replace the battery, and if there is no battery present, you should call emergency services just to be safe and exit your residence.
A hard-wired smoke or carbon monoxide (CO) alarm is a detector that is wired to 120V household electrical circuit and connected to other detectors throughout your home. Hard-wired smoke and carbon monoxide alarms sound simultaneously, on all levels of your home, when a single unit detects smoke or gas.