1. Easy to install Pre-drilled holes on the back of the panel for quick installation and fix, carry for camping or other outdoor activities. 2. Use 10A solar charger controller to prevent battery overcharge, voltage, discharge and short circuit and reverse polarity protection. The battery is fully protected. 3. Product features: Built-in voltage regulator module. Output port: dual USB, DC5521 female 4. Product use: Charge 5V devices such as mobile phones and sports cameras, and charge 12V car batteries such as cars and boats 5. The package includes 18W solar panels, 10A solar charger regulator controllers and cables with alligator clips for battery charging connection, 1 * car charger cable, 2 * buckle, 4 * suction cups, easy to repair and install.