Using the most efficient solar panel cells available, it converts solar energy into electricity with a 20%-23% conversion rate. You can use it to quickly charge Cellphones, Power Banks, Tablets and most 5V USB. Use it when going camping, hiking, or when you find yourself in any place without sufficient power. * Travel Ready Although it can not be used in raining days due to the lack of sun, the solar charger is water resistant and rugged enough to withstand most environment conditions in the wild. * Accessories Adapter cable All technical data at standard test condition