1. Copper indium gallium selenide thin film solar cell 2. Single mobile phone charging solar panel Built-in voltage stabilization, drop-resistant, light and easy to carry, cannot be charged in areas not exposed to direct sunlight 3. Dual mobile phone charging solar panel with built-in voltage stabilization, drop-resistant, light and easy to carry, can be charged in areas not exposed to direct sunlight 4. Solar panel placement The charging current is about 2.2A under the sun at noon on a sunny day. The solar panel should be at an angle of 40 degrees to the horizontal plane. At 12 noon, the solar panel is facing the sunlight, so that solar energy can be better utilized. You can also refer to the installation angle of the solar water heater. Note: Do not place the solar panel directly on the ground, the effect will be greatly reduced! 5. USB voltage regulator socket The voltage regulator module has a built-in indicator light, the patch circuit quality is stable, and the mobile phone is safe Material: Copper indium gallium selenide thin film solar cell Single set contains: solar panel*1 bracket*1 Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.