Most portable emergency radios offer multiple power options: hand crank, solar charging, and internal rechargeable batteries. Some models also support replaceable batteries (AA/AAA) or USB charging for recharging the internal battery or powering phones.
Many models include NOAA/weather-band reception for alerts, an SOS alarm or emergency siren, and built-in flashlights or reading lights that can be used for visual signaling.
Typical coverage includes FM (about 87–108 MHz), AM (about 520–1710 kHz), and NOAA/weather-band channels (around 162.400–162.550 MHz). Exact ranges depend on the model.
Portability ranges from compact pocket-sized units a few inches tall to larger boombox-style radios. Listed heights vary roughly from about 2 to 9 inches, and weights range roughly from 0.2 to 3.0 pounds depending on model and features.
Some emergency models list a water-resistance rating (for example, IPX3) or are described as water-resistant for outdoor use. Not all models include a formal IP rating, so verify the spec for each unit.