BigBlue 5V 28W Solar Charger with Digital Ammeter Waterproof Foldable Dual USB Ports Solar Battery Charger for iPhone 8/X/7/6s, iPad Pro/Air 2/Mini, Galaxy S8/S7/S6/Edge/Plus, LG, Nexus, HTC Built-in Ammeter: The amount of Amps of our 28W solar charger depends on your devices, light intensity and cable used. If your device has an input current of 1A (such as the iPhone), the amount of ammeter will show between 0.8A and 1A in theory. Easy To Carry: With compact size (11.1  6.3 1.3in folded or 33.1  11.1 0.2in opened) and lightweight (21.0 oz) design, dual-port power applys to all the Android devices and some of the DSLRs by connecting the cable attached. You will need an extra cable for other devices. Exclusive SmartIC Technology: With the built-in intelligence chip, our solar charger can detects your device to deliver its fastest possible charge speed and assure charging stably (up to 4.0 A max overall). SunPower Solar Panels with high solar conversion efficiency by up to 21.5% - 23.5% is great for any outdoor activities such as camping, climbing, fishing etc Special PET Polymer Surface: Industrial-strength PET polymer fabric protects your solar panel and your devices from occasional rain or wet fog. IPX4 waterproof level, but keep it away from water when you have some devices on charge Package & Warranty: 24-month warranty and friendly customer service. Note: Please don't place the item you are charging inside the pocket attached to the solar panel in order to avoid overheating then damage your devices.