The Portable Solar Panel is water and dust resistant. It uses smart solar technology to archive high-energy conversion with the automatic rest chip. It allows high speed charging for all your devices with 1x QC 3.0 USB port and 1x 5-Volt 2.4 A USB port. Perfect for outdoor activities including beach, picnic, and park camping, climbing, and hiking. Place it under direct sunlight without shadow or cover. The opened size is 28.34 in., with 11.89 in. Thickness is 0.47 in. It is portable and foldable.