Features: 1) Cable: 2.0 - 70.0mm³ / 50 - 800A color optical 2) Length: 2.0 - 8.0m / 8.0 - 25.0' 3) Automatic polarity converting system guarantees both good and disabled vehicles battery safety 4) Latest micro-electronic technology offers higher efficiency, lower power-consumption and weaker heat production 5) Strengthened fire-proof ABS cover makes the protector strong, light, and durable