BigBlue 28W Solar Charger with Digital Ammeter, 2USB(5V/4A Max Overall), Portable Waterproof Solar Panels Charger for…

Amazon.com Price: $64.96 (as of 13/06/2021 14:51 PST- Details)

Built-in Ammeter: The ammeter can measure the current in a circuit. The value of Amps of our 28W solar charger depends on your devices, sunlgiht 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.
Exclusive SmartIC Technology: With the built-in intelligence chip, our solar phone charger can detects your device then deliver its fastest possible charging speed(single usb port up to 5V/2.4A Max, dual USB ports up to 4A Max overall). Dual-port applys to all the 5V Android devices and apple devices. Note: This solar charger is not compatible with the iPad Pro.
High Efficiency: SunPower Solar Panels with high solar conversion efficiency by up to 21.5% – 23.5%. With compact size (11.1 × 6.3× 1.3in folded) and lightweight (21.0 oz) design, includes 4 clip hooks, which allows you to hook your solar panel everywhere convenient to get solar access (trees, backpacks, vehicle, etc.), so it is easy to carry for any outdoor activities such as camping, climbing, fishing etc.