... box 4.YOUGUO patented New solar home lighting, solar homekit, solar home generator kit ComponentsTechnical parametersRemarkSolarpanelsilicon wafermonocrystalLife span:20-25 ... USB port,charging mobile directly. Instruction and main switch for load working.Life span:8-10 yearspackaging,size, weightcolor ... battery. much more portable and praticalPacking Latest Solar Home Lighting Kit System(YG-SLK-C2)