Emergency Power USB Hand Crank SOS Phone Charger Camping Backpack Survival Gear Cell Radio Light This Hand-Crank USB charger is designed to energize any phone or USB compatible device in case of emergency or lack of power. Maximum Output Voltage: DC 6V Maximum Output Current: 300 mAh 1 Minute Charge= 3-5 Minutes Talk-Time You can also turn this into a flash-light by simply inserting a USB light.