28W SunPower Solar Panel with Digital Ammeter, Portable Solar Panel Charger with Dual USB(5V/4A Overall), IPX4 Waterproof, Compatible with iPhone 11/Xs/X/8/7, iPad, Samsung, Google Pixel etc.

Built-in Digital AmmeterBigBlue 28w solar panel charger can measure the current real-time value, convenient to your use. Note that the value of actual outputs depends on your connected devices, sunlight intensity and the used cable. If your device has an limited input current of 1A (such as the iPhone), the amount of ammeter will show between 0.8A and 1A in theory.
Higher Solar Conversion EfficiencySunPower Solar Panels is the most durable panels at present, whose conversion efficiency can reach 24%. If clouds blocking the sun, this portable solar charger can detect intelligently the sunlight and restart to charge your electronic in 30s when there are enough sunlight. Foldable design and 4 carabiners is easy to carry for any outdoor activities such as camping trip, climbing, fishing etc..
Exclusive Smart IC TechnologyWith the built-in intelligent chip, our solar phone charger detects your device then deliver its fastest possible charging speed( Single maximum output up to 5V/ 2.4A, dual maximum outputs is up to 5V/4A). Dual-port applys to all the 5V Android devices and 5V powered apple devices.
Note: We don't provide the lightning cable for Apple devices.
Special PET Polymer SurfaceIndustrial-strength PET polymer fabric and IPX4 waterproof panels protect your solar phone charger from occasional rain or wet fog, but the USB ports and ammeter are not water-resistant. The zipped pocket keeps your devices safe and clean while camping. Please don't place your cellphones inside the pocket while charging for fear of overheating and damage.