The Nomad XP includes an integrated 5000mAh rechargeable USB power supply that is designed to extend the battery life of small portable electronic devices. The optional Wild River Clip-On Solar Panel offers an alternative way to recharge the Nomad XP USB power supply. Additionally, an integrated rotating 3 level LED light system, with white light and green light options, is designed to illuminate your work area and internally into backpack. The Nomad XP also has the capacity to hold up to six 3600-series and four 3500-series trays. U.S. and Intl Patents Pending.