... battery ,controller build inside Wide Input solar voltage Range with DC 5V , mobile charge socket Solar power integrated DC system compact size ... protection with full-meanings LED Display Design solar controller and battery inside, only solar panel and load connection outside, more conveniently ... 78mm238*260*178mm238*260*178mm392*335*180mm392*335*180mmWeight(Kg) Solar system DC -20W,40W,60W,100W