Features: START VEHICLE: When there is no power, the solar panel connected with crocodile clip can be used to start vehicle or boat. MULTIPLE CHARGING WAYS: Can be used to charge vehicle by car lighter or to charge device like cell phone by USB. EFFICIENT:Adopt monocrystalline silicon material, provide 19% high photoelectric conversion rate. FROSTED SURFACE: Frosted panel avoids scratches on surface, making the panel more durable. NO BATTERY: Without build-in battery,no troubles caused by heat or strong sunshine. PORTABLE: Thin and light, can be fixed on car visor or on glass by suckers. Convenient to install, practical for outdoor activity.