Need for emergencyBuilt-in 4000mAh battery,which can charge the mobile phone in emergency. If there is no electricity to charge,the hand crank and solar panels can save electricity for you. Portable AM/FM radio,3-mode zoom flashlight,reading light,solar powered radio to meet your various needs and come in handy in emergency situations[Upgrade Large Version capacity at 4000mAh] The battery capacity is twice or even four times that of other solar powered radios in the market. The solar radio uses replaceable lithium-ion batteries,which can effectively extend the electromagnetic life of the radio. In the event of a power failure or emergency,it can be used as a mobile phone power bank in an emergency[4 charging methods] Outdoor sports camps have blackouts or blackouts due to bad weather. The hand crank and solar panels can power the radio in an emergency. Battery charging and USB fast charging are the main power sources for daily use. The battery is replaceable and can be purchased at specialty stores and supermarkets[3 types of zoom and reading light mode] This radio incorporates multiple functions and can provide illumination. If you are an outdoor enthusiast or need to go to places where there is no light,this 3-mode flashlight radio is a good choice[Flashing light for help] The solar radio has the function of asking for help. When you encounter difficulties,dangers or dark places,double click the SOS button to activate the loud siren and flashing high beam to remind others