BigBlue SolarPowa 28 (with no ammeter)

Updated Triple USB Ports: 3 USB charging ports( Each is 5V/2.4A Max) with smart charging technology which can recognize your device and then provide optimal charging speed vary with different devices. The 3 USB ports offer the total current at 5V/4.8A Max. CE/ FCC/ RoHS certificated, BigBlue ensures 100% safe charging with overcharging, overheating, and short circuit protection. Easy To Carry: With a compact size (11.1 × 6.3× 1.3in folded) and lightweight (20.6 oz) design, BigBlue foldable solar charger panel bag is small and light enough to fit into any camping backpack, hiking daypack, or emergency kit. They’re also good for stashing in an emergency kit. The 3 USB ports allow you to charge multiple devices at once. High Energy Conversion: Highly efficient SunPower panels convert up to 21.5-23.5% of solar power into free energy in enough sunlight. This special PET polymer surface protects it from occasional rain or wet Fog and all the ports are covered by a cloth flap and rubber