Portable Solar Power Bank Mobile Charger. Domestically printed and packaged. Its water resistant, dust proof, shock resistant, and comes with 4000 mAh of battery capacity. Equipped with dual USB charging ports and a carabiner clip for easy attachment to travel gear. Features an LED flash light, and LED light charge indicators to let you know the percentage charged. Hang it on yoru back pack during a hike and let the solar panel charge the device. Probably the most useful thing you can put your logo on