Features1High-efficiency solar conversion: With a 25% solar energy conversion rate, it provides lasting power for your devices.2Dustproof and waterproof design: IP54 dustproof and waterproof, suitable for various outdoor environments.3Wide compatibility: Compatible with Apple, Huawei FCP, Xiaomi QC3.0/2.0, meeting the charging needs of various devices.4Multiple protections: Overvoltage, short circuit, overcurrent, overcharge, overdischarge, overpower, electromagnetic field, temperature, refresh, anti-reverse conservation, ensuring safe electricity use.5Portable folding design: Lightweight and easy to carry, it is the ideal choice for outdoor travel, camping, and self-driving tours.SpecificationColour: BlackProduct material: PET laminated SUNPOWER solar panel/PVC waterresistant fabricProduct power: 28W /21W (optional)Output current: 4.8A (peak current)Output voltage: 5v+0.3vConversion efficiency: 25%Circuit features: voltage stabilization, intelligent identification21WOutput interface: 1USB+1Type CWeight: 500g / 1.1lbExpanded Size: Length: 66.0cm / 26.0in Width: 28.0cm / 11.0inFolded Size: Length: 28.0cm / 11.0in Width: 15.0cm / 5.9in Thickness: 3.0cm / 1.2in28WOutput interface: 1USB+1Type CWeight: 673g / 1.5lbExpanded Size: Length: 82.0cm / 32.3in Width: 28.0cm / 11.0inFolded Size: Length: 28.0cm / 11.0in Width: 15.0cm / 5.9in Thickness: 3.5cm / 1.4inPackage List1* Solar panel pack2* Carabiner1* Data cable