12V starter-Charger. Bring a fast, powerful charge wherever it"s needed. For cars, trucks, boats, RVs, farm equipment, motorcycles, lawn tractors with 12 volt batteries. 2 LEDs power on/full charge.Rust-proof, shock-resistant polypropylene case for extended life and safetySolid-state circuitry with silicon diodes for optimum performanceSpark-proof protection in automatic mode for added safetyCopper wound transformers for long lifeReverse hook-up protection, UL listed