Excellent Safety & Durability The ETFE material for this solar panel is IP67 waterproof and dust-proof, which makes sure durability and no risk of burning or explosion. And the solar charger also has overcharge, overload, over-current, and short circuit protection functions to ensure the safety of your devices. High Conversion Efficiency Made of single-crystal silicon, the sunlight conversion efficiency of this 300W solar panel can reach up to 23%. The small holes make it easy to be attached to backpacks, tents, trees, and RVs. It is a solar charger that is convenient for outdoor and home use. Foldable and Easy to Install 300W solar panel is compact and lightweight, convenient to carry. Comes with a retractable stand, three different angles allow it to get the most input during the peak sun hour. What You Get 1* CTECHi 300W Solar Panel, 1* User Manual. CTECHi offers sincere customer service and a 12-month warranty. We are committed to improving our products to enhance our customer’s experience. If you have any questions please feel free to contact us without hesitation.