Solar panel:21W (Sunpower solar cell)
Folding Number:3pcs
Transformation Efficiency:
≥ 23%
Output voltage:5V Dual USB
Output current:3.5A Max
Material:600D polyester
Open Size:700×290×16mm
Folding Size:290×170×30mm
Weight:0.57kg Color:Black
More details see it as below: