Feature:1. Weather Resistant Design: Weather resistant design, weatherproof design can withstand harsh weather conditions. More durable, long lasting and economical.2. Polycrystalline Silicon Material: The solar panel charger adopts polycrystalline silicon material, which has good light transmission and sealing, simple operation and convenient use.3. Principle: A solar panel is a device that absorbs sunlight and converts it directly or indirectly into electrical energy through photoelectric or photochemical effects. It is an ideal device for scientific research projects.4. Scope of Application: Solar panels are ideal for small home projects, science projects, electronic applications, charging small batteries and other DIY projects with solar power.5. Lightweight and Portable: Solar panels are small and lightweight, lightweight, compact, stylish and sturdy, beautiful shell, easy to carry and use.Specification:Item Type: Solar PanelsMaterial: PolysiliconWeight: Approx. 43g / 1.5ozSize: Approx. 90 x 90mm / 3.5 x 3.5inPower: 1WBattery Parameters: 2 AA Batteries (Battery Not Included)Working Voltage: 4VWorking Current: 250MAUsage: Can Charge 1.2V 2 x AAFeatures: No Power Storage Function.Package List:1 xSolar Panels(Battery Not Included)