ERGONOMIC: Solar backpack is breathable and has an  S shaped back pad ergonomical design. 
HIGH CONVERSION RATE: Solar powered backpack adopts third generation solar panel, with a photoelectric conversion efficiency of 23%‑25%, more than 60% higher than ordinary solar panels.
WATERPROOF: Solar powered backpack adopts PVC coated fabric and waterproof zipper to improve waterproof performance. 
EASY TO USE: Solar panel backpack has multiple internal compartments for one key storage making it more convenient for travel. Designed with a USB interface, sound interface it's more convenient to listen to songs and charge.
INTELLIGENT CIRCUIT PROTECTION: Solar panel has 9 intelligent circuit protections; overcharge protection, over voltage protection, over current protection, over power protection, short circuit protection, temperature protection, overload protection, reverse discharge protection, static protection.
 
Specification:
Item Type: Solar Backpack
Product Fabric: Nylon
Product Lining: Polyester
Product Filling Material: Pearl Cotton
Product Size: Approx. 43x30.8x14cm/16.9x12.1x5.5in
Power: 14W
Working Current: 2.1A
Working Voltage: 5V
Product Color: Black
 
Package List:
1 x Solar Backpack  
1 x Instruction Manual  
1 x 3.5mm Extension Cable