Features Highly efficient charging: our solar charging panel uses polycrystalline silicon as a material with a conversion rate of 19% for efficient charging and stable performance. Emergency power: this solar panel ensures that you don't have to worry about running out of battery on long hikes or camping trips. Multi-purpose: this solar panel is perfect for camping, backpacking, hiking and outdoor adventures and is an indispensable tool in an emergency. EASY TO CARRY Our foldable solar panel comes with two keychains, which can be hung on a hiking bag for easy carrying. WATERPROOF: The weatherproof ETFE outer layer of this solar charging module improves performance and durability and extends the life of the panel. Specification: Item Type:Foldable Solar Panel Charger Material: ETFE, polycrystalline silicon. Output voltage: 5 V. Current: 0-2A. Output interface: Dual USB Wafer: Grade A Polycrystalline Silicon Conversion Rate: 19% Size when unfolded: approx. 700 x 185 mm / 27.6 x 7.3 inches. Folded size: approx. 185 x 135 x 25 mm / 7.3 x 5.3 x 1 inches. Process: ETFE laminated integrated (laminated integrated technology of the 2nd generation). Waterproof level: IPX6. Package list: 1 x foldable solar panel charger. 2 x key buckle Package List 1 x Foldable Solar Panel Charger 2 x Key Buckle