Charge your devices on-the-go with this portable waterproof solar charger. With a battery capacity of 5000mAh, it can charge your smartphone up to four times depending on the model. With an included snap hook, you can attach this to your backpack when hiking or purse/bag when you're commuting to work. It can be used in any outdoor environment and is perfect for people who love being outdoors. This is waterproof, dustproof, anti-shock, skid resistance. Perfect for campers, hikers, skiers, construction workers, and many other outdoor enthusiasts. In addition, it is made of eco-friendly silicone rubber and ABS + PC material, and with rubber paint surface process. Please kindly note that it's comparatively slow for the solar charger to recharge itself via solar power, due to the limited surface of the solar panel.