Useful as a portable radio during emergencies, disasters, etc. Light hand crank handle charges the built-in capacitor Just 1 minute charge and the radio/LED will run for about 30 minutes. It is resistant to long-term storage. The built-in rechargeable battery uses a double layer electric capacitor that is said to last for 10 years. Great for occasions Works with AAA batteries (sold separately). Comes with a strong white LED light for power outages. The radio part can receive 2 AM/FM bands (wide FM compatible), and it also comes with a USB port that can be used to charge your phone or smartphone with a hand crank. (※Cannot be charged from batteries) Waterproof and dustproof specifications that can be safely used outdoors. Can be used in wet hands, splashing water, or in dusty outdoor conditions (*Equivalent to JIS IP54 grade).