VINSIC Solar Panel 8W USB Charger, Foldable and Portable Dual-Port Solar Charger for 5V USB Devices Perfect for rapidly charging Smartphones, Tablets, MP3 Players , GPS Units and more while emergency preparedness, Camping, Hiking , Backpacking and other Outdoor Activities 8W monocrystalline 15-18% efficient solar array provides up to 5V / 2A total through one charging port Intelligently identifies each connected device and speaks its language - allowing the fastest charge time for EVERY device up to 2 Amps under direct sunlight No additional battery needed for charging external devices, 100% green energy with zero carbon footprint. Industrial-strength PET plastic faced solar panels sewn into high-wear polyester canvas for weather-resistant outdoor durability