... portable,2 LED use,lighting up 15 hours, cellphone charging, small solar power system Solar Energy Kit Operating InstructionOverviewSolar energy kit is a small PV generating system ... Sony Ericsson K750,Iphone, USB. 5) Operating manual5 Parameters Solar panel,size,cable3W 22.5*19.5cm 3MBatteryNI-MHVolatge & currency6V ... LED bulbBatteryOver 15 yearsOver 10 yearsOver 2 years 3W portable solar power system