Nekteck 28W Solar Charger is your new best friend when you're far from home. Travel with ease using the charger's bungee loops which attach to your backpack. Unfold the device and expose the 28 watts Sunpower solar panel, each section putting out approximately 800~1000mA under strong sunlight. Dual USB charging ports allow up to two devices to recharge at once at a maximum output current of 4.2 Amps total. No matter where you go, the Nekteck Triple Panel Solar Charger will be ready for you. Fast Charging Technology: SmartIC Technology is the latest charging solution it has its own microchip that detects the device plugged into through USB PIN signals, which gives output at full power and full charging speed. Not all charging ports are created equal. Standard ports only charge Apple OR Android devices at full speed. But with Smart IC technology, each port intelligently identifies your device and seeks to maximize its charging speed up to 2.0 amp per port or 4.2 amps overall. Dual USB Ports with a maximum of 4.2A total output and capability of charging two devices simultaneously. Keep your devices fully charged on the go in no time. High Quality: The canvas is created to withstand rugged durability for outdoor use. with Ultra-lightweight (25 oz) and ultra-compact (8.3x 15.1x 1.26in folded) design, it easily fits in your backpack. Broad Compatibility: Compatible with all iPhones, tablets, GPS, Camera and other USB-supported devices. Specifications: Power input: 28W High-efficiency Panel Power output: 5V Standard USB port x 2 Output current: up to 4.2A (two USB port used simultaneously)