Product name: multifunctional handcranked Bluetooth speaker radio Weight: 409.5 g Key benefits Handcranked power provides operation without external power, ideal for outages and outdoor use. Bluetooth speaker and radio in one device for entertainment and information access. SOS warning function adds a safety signaling capability in emergencies. Uses include strategic materials / emergency disaster prevention / family reserve / SOS warning / travel / exploration / camping Lightweight and portable at 409.5 g for easy transport in kits or bags. Charging options manual power generation solar power generation C type charging rechargeable and replaceable batteries Compatibility and performance Bluetooth enabled for wireless audio playback with compatible devices Builtin radio for access to broadcasts when needed Compact form factor suitable for travel, camping, and emergency kits Use scenarios 1) Power outage or disaster: crank to generate power, use the radio or Bluetooth speaker, and activate SOS warning if required. 2) Camping or exploration: rely on hand crank or solar power to keep the device powered for music, information, and safety signaling. 3) Travel and family reserve kits: a compact, multipurpose device that provides audio playback, information, and emergency alerts.