1. Color-coded clamps for easy polarity identification. 2. Flexible and tangle-free cables for easy to use at the temperature from -40℃. 3. Different length of cables to meet all hookups. ● 12FT( 3.7M) Cables: Limited hookups: Front to Front and Side to Side hookups only. ● 16FT(4.9M) Cables: Perfect for all 3 types of hookups: Front to Front,Side to Side and Front to Black hookups. ● 20FT(6.1M) Cables: Perfect for all 3 types of hookups: Front to Front,Side to Side and Front to Black hookups. 4. Special booster cables are with Safety Plug, Qucik Plug, Surge Protector, Emergency Light and Tester special functions.