Specification:Material: Copper, Rubber.Color: Red, Black.Jaw width: 0.67inch/17mm.Head width:0.59inch/15mm.Tail width:2.52inch/64mm.Jaw open size maximum:1.3inch/33mm.Length:3.35inch/85mm. How to use:-Make sure both cars are turned off.-Connect one red clamps to the positive (+) post of the dead battery.-Connect another red clamps to the positive (+) post of the normal battery;-Connect one black clamps to the negative (-) post of the normal battery;-Connect another black clamps to the frame bumper or engine block of the dead battery.DO NOT CONNECT DIRECTLY TO THE NEGATIVE (-) POST. Cautions:1. Do not reverse the operation sequence of the jump start.2. Do not use jump start to start car if the number of battery indicators are less than 3 to protect the jump start.3.
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