USB fast charging and DC ports. The built-in controller box has fast charging USB-A 18w Max (5V/3A, 9V/2A, 12V/1.5A), USB-C PD 2.0 and DC 19V/2.1A (maximum) ports, which directly connect and charge daily electronic devices such as mobile phones (Android and Apple), iPads, laptops, mobile power supplies, small power stations, etc. USB-A and USB-C allow you to charge two electronic devices at the same time, but only when these three ports are used at the same time, the DC port can work. Note: Our solar charger cannot store electric energy. [Smart IC chip technology and security function] The integrated IC automatically detects the connected devices and provides optimized charging. The attached LED displays the charging status. [Portable camping solar panel] is specially designed for mobile camping and off-grid exploration. The 40W foldable solar panel is very suitable for long-distance travel, when you need more power without sacrificing portability. The small size of 8.0 x 11.1 x 1.8 inches (when folded) and the lightweight design of 2.86 pounds (1.3 kg) can easily fit into your backpack, providing portability and simplicity. It is also a necessary first-aid kit stored in the backpack. [High solar energy conversion and IP67 dustproof and waterproof] High efficiency solar panels convert 24% of solar energy into free energy in sufficient sunlight. IP67 dust-proof and waterproof and ETFT lamination make solar panels work in unexpected weather, which is more durable and wear-resistant than other PET solar panels and the most durable ones. Note: The junction box is not waterproof.