... 530-1650KHz(2.5~3circle/sec.)Min.Radio Power Duration after winding for 1Min.4OMin. Radio Power Duration after sunshine 5 hoursMaximum ... ,rechargeable battery store energy green environment-friendly,economical,safe,recyclable, radio can be work under the sun if the battery without ... speacker and earphone can be used ,adjustable volume Adopt advanced radio IC,high sensitivity FM /AM(medium wave)two-brand ...