4 Set Angles for Max Sunlight Absorption: No matter wheryou are, the season, or time of day, you can maximize sunlight absorption. Easily switch between 30°, 40°, 50, or 80° anglees. IP67 Waterproof: The solar panel’s IP67 waterproof protection allows it to withstand even the harshest weather and your adventurous lifestyle. 1.5X Higher Energy Conversion Efficiency: Monocrystalline solar cells and a powerful sunlight-trapping surface provide a conversion efficiency rate up to 23%.