Features: Solar energy and efficient solar charger circuit. Environmental protection and energy inexhaustible. Rechargeable, no extra wires, easy to use. Up to 18% high conversion rate monocrystalline solar panel and PET material, safe, long service life, user-friendly. Slim foldable design, freeing up more space for you, fitting for both outdoor and indoor usage. Standard USB port fits to be the power supply for mobile phone and other portable digital devices. Intelligent recognition mobile phone system, satisfying different cell phone model. IP65 water resistance ensures it can be used in bad weather conditions. Best choice for outdoor camping, climbing, fishing, hiking, picnic, barbecue, etc.