Guarantee: 30 days free no-questions-asked returns + return label provided + 2-year warranty on solar panels + free replacement if damaged within 90 days. Long warranty period and perfect after-sales service. About AP-SP-029-BLA 【MC-4 and 4-in one multiple output methods】: the MC-4 output can deliver 20A (max) current, while the DC port only carries 10A, dual USB port (5V/2.4A per port) with iSolar technology to charge your 5V powered gadgets and a 18V DC output (18V/3A) to charge your Your 12 12 - V car battery and your portable generator, the parallel connection of the junction box for connecting multiple foldable solar panels. 【High efficiency】: 140 W solar cell is made from the USA, with up to 22% efficiency and provides endless power for laptop, power plant, mobile phone and other batteries under the sun. 【Foldable and Portable】: 1/3 lighter than the same power of solar silicone. The overall output increased by 1/3 compared to the same solar panel size. Folded only 36 x 65 x 3