Features: 1. Simple & Eco-friendly: The solar charger panel converts solar radiation into electric energy by absorbing sunlight, then you can charge your personal electronic equipment when you are hiking, climbing, camping, picnicking, etc. 2. Principle: A solar panel is a device that converts Solar radiation into electric energy directly or indirectly by means of photoelectric effect or photochemical effect by absorbing sunlight. 3. Foldable & Portable: The solar charging panel can be folded into as small as a tablet, designed with a hanging hole to conveniently hang it on the backpack. 4. Reliable Quality: Using the monocrystalline solar panel with frosted PET film, the solar has a smooth surface, and is wear-resistant, anti-fingerprint. Its waterproof quality allows you to use it in any weather condition, whether it is rainy or snowy. 5. Different Set Optional: 30W, 40W, 50W, 60W sets are available, to meet your different needs. Specification: Material: PET Color: Blue Power: 30W, 40W, 50W, 60W Size (Unfold): 945 x 280 x 5mm, 1175 x 280 x 5mm, 1340 x 280 x 5mm, 1500 x 370 x 5mm Weight: 900g, 1300g, 1250g, 1800g Package Included: 1 x Solar Panel Folding Bag Set