The Battery Tender Solar Charger 021-1176 is a compact and efficient solar panel charger designed to keep your batteries charged and maintained. It features a built-in solar controller that regulates the charging process to prevent overcharging and extend battery life. The charger is weatherproof and can be easily mounted on any surface, making it perfect for outdoor use. It comes with a 12V DC plug and alligator clips for easy connection to your battery. The Battery Tender Solar Charger 021-1176 is an eco-friendly and convenient solution for keeping your batteries charged and ready to use.