FunctionCrank charger can charge for about 3mins, can maintain mobile phone talk time for 5-10mins, and standby time for 3-8hs (actual data depends on the specific conditions of the mobile phone). Red LED Light and Stylish Look The red LED light design can be used as both indicator light and emergency light. The translucent frosted box, elegant and delicate, is a great gift for a friend or yourself. Good Tool A simple hand crank converts mechanical energy into electrical energy, suitable for charging all kinds of mobile phones or digital devices. Simple, convenient and practical. Standard USB interfaceThe emergency hand crank charger has a standard USB interface, 5V output, suitable for charging various USB devices and mobile phones . It can be used as a boring toy when charging the phone. Emergency Charger A portable emergency manual charger, the charger is suitable for outdoor activities, good outdoor backup power , charge your mobile phone or other digital devices at any time.