Low cost,easy handle,1 year warranty.It's good for camping as emergency system. 1, Battery-Can choose 12v 7.2 Ah/ 12Ah / 20Ah AGM battery if necessary2, Solar panel-Can choose 10W or 20W or 40W solar panel with poly crystalline cell3, DC output-(1.0A/12VDC*2)+(1.0A/1DC2V*2) 4, AC/DC Adaptor-19.0VDC / 2A, USB output-(1.0A/5VDC*1)+(0.5A/5VDC*2)5, Car Charger output-4A/12VDC6, Accessories-Optional . ...