【High-Efficiency Solar Technology】Features advanced high-sensitivity solar panel technology with 23% conversion efficiency, 60% higher than traditional polycrystalline panels for faster, more reliable outdoor power generation. 【Smart Voltage Regulation】Built-in intelligent circuit protection system maintains stable 5V output, automatically disconnects without sunlight and restarts when light is sufficient, ensuring complete device safety. 【Dual USB-A Fast Charging】Equipped with two USB-A output ports supporting up to 2.1A current, enabling simultaneous fast charging of phones, tablets, and power banks to meet multiple device needs. 【IP64 Waterproof Design】High-density TPU surface coating provides splash-proof and mold-resistant protection, making it durable and suitable for various challenging outdoor environments. 【Ultra-Portable Foldable】Unfolds to 64×30cm for maximum solar collection, folds to just 2cm thickness weighing under 500g, easily fits in backpacks for camping and travel adventures. Specifications: Input Voltage: 5V Output Voltage: 5V Output Current: Max 2.1A Power: 21W Charging Efficiency: 23% Product Dimensions: 640×300×3mm Waterproof Rating: IP64 Connector Type: Dual USB-A Product Weight: 470.5g Package included 1 x Solar Charging Panel 1 x Carabiner 1 x English User Manual Specifications Brand N/A Certificate CE ColorStyle A Material TPU Output 2.1A Output Interface Dual USB Packaging Type Colored Box Plug Type (For Supply) N/A Power Source None User Manual (Language) English Gross Weight 0.808kg Volume Weight 0.587kg Package Length 33.600cm Package Width 19.500cm Package Height 4.000cm