Multiple charging methods: hand cranking, solar charging, micro USB cable, and 3 AAA batteries (not included). Convenient and fast, with long-lasting battery life. The SOS alarm function is used for emergency situations: in the event of a disaster, you can promptly use alarms and alerts to provide timely rescue. USB Charging&Aux Music Player: It has a 4000mAh battery capacity and supports Aux player, allowing you to charge your phone and listen to music. LED flashlight: provides illumination and mobile phone charging, as well as desktop lights for reading. Application: It is suitable for outdoor camping, mountaineering, indoor and outdoor gatherings, poweroutages, earthquakes, floods, hurricanes, typhoons, tornadoes, blizzards Specifications: Channel selection: manual Function: USB interface, digital display, built-in speaker Signal-to-noise ratio: 38-45 (dB) Rated voltage: 2.7-4.2 (V) Rated power: 2.5 (W) Rated frequency: FM: 76~108MHz, AM: 522~1620KHz Material: ABS Size: 202mmx90mmx80mm Battery capacity: 4000mAh Flashlight brightness: 70LM After fully charged, it can support: Flashlight lighting: for 18~20 hours Radio listening: (medium volume) for 30~35 hours AUX audio playback: for 35~40 hours Hand cranking for 1 minute (≥130 rpm/s) can support: Flashlight lighting: for 5~10 minutes Radio listening: (medium volume) for 3~5 minutes