Shikha Hand Crank Generator, Portable Crank Generator Multifunction Hand USB Generator Crank Emergency USB Charger Generator for Emergency Survival Experiments Power Suppy, Camping Field Works

Specification Stable Power: 3v/6.6A, 5v/4A, 6v/3.3A, 9v/2.2A, 12v/1.6A, 15v/1.3A for selection Max Cranking power: 20W Rotating speed: 2000rmp/min Size:6.7x3.5x3.15in Package Included 1 x Generator Note:  Faster rocking for higher generation power and voltage.  Please adjust the voltage to 5V before you using USB interface.  Shake the generator output voltage must be biger than the setting voltage to regulate theoutput voltage When using USB port to connecting external devices,please be sure to adjust the voltage to 5V first,then plug your devices