Voltaic Solar Daypack Panel Color: Silver Green Orange Charcoal The Voltaic Solar Daypack is built tough for use as a hike bag or daypack. There are pockets and wire channels for multiple electronic devices. Features: High density padding in the shoulder straps and back panel for comfort. Nylon mesh backing material for better air flow. Removable waist stap. The solar panels provide protection for fragile items inside the front pocket. Wire channels throughout the bag take power to the shoulder strap and for headphones etc. Adjustable phone / MP3 pouch on the shoulder. Second lined MP3 / sunglasses pouch inside. Optional clip in padded laptop sleeves. Bladder pouch and channels to run the tube to the shoulder strap. Weight: 3.5 lbs (1,590 grams) including battery and solar panels.Weight: 3.5 lbs (1,590 grams) including battery and solar panels. Dimensions: 18" high x 10-13"wide x 6-9" deep (46cm high x 25-33cm wide x 15-23cm deep). Volume: 1,500 cubic inches (25 liters) Includes a 2,200mAh Li-Ion battery pack with 3 voltage settings to store solar power. When not in the sun, the battery can be charged using the AC travel charger or DC car charger. Comes with 11 standard adaptors including a car charger socket and USB adaptor so you can always use a standard charger for your device. Includes adaptor plugs in universal sizes and for common cell phones, which eliminate the need to use a car charger for common devices. The three solar panels are tough, light weight, waterproof, and generate up to 4 watts of power.