The Premier® Rugged Weatherproof Back-up 4,000mAh Battery USB Charger is designed to provide you with reliable power when you need it the most. With 4,000mAh of rechargeable battery power, you can charge your USB-powered devices multiple times while you’re on the go. The waterproof IPX6 rating ensures that your power bank will keep working even in the harshest weather conditions, so whether you’re camping, hiking, or just spending time outdoors, the Premier® Rugged Weatherproof Back-up 4,000mAh Battery USB Charger is the perfect accessory to keep your devices charged and ready to use.