Durable&Safe Design with Superior Conductivity]: The jumper cables we produce are made of sturdy ABS plastic, which can withstand the harsh tests of frequent use; The fully insulated rubber double grip design ensures safety during use; The connecting wires and crocodile clamps are made of pure copper forging, which has excellent conductivity, ensuring efficient power transmission every time. No need to worry about wear or short circuits - our design can meet your needs in any situation. [Safety Precautions]: 1. Don't reverse the operation sequence of the jump starter. Please be careful when using this product, this item cannot be overloaded, check your device's power before using it. 2.Remember to remove the product from the vehicle within 30 seconds after the vehicle starts, as failure to do so may lead to security incidents. 3. Always verify that your power bank can support your car keep in mind, the jump starter will not convert or reduce voltage.