An emergency radio is a radio receiver designed to remain functional during a power outage or in isolation from contact with civilization.
Such radios are often designed to run on minimal or renewable power sources like solar.
Rely on emergency and weather radios and locator beacons to help rescue teams locate you in an emergency.
Emergency radios are generally designed to cover the standard AM and FM broadcasting bands and weather radio in countries that provide that service.
Basic shortwave radio coverage (for situations where local radio is out or not available) is less common.