Please note ( For Smart battery Clip ) : 1. if your jump starter without enough power, after connect with our clip cable, it will warn with beeping . 2. if your jump starter has power, but only 3 built-in batteries, our clip cable will warn with beeping too, please connect with jump starter that has 4 built-in batteries . Red for + , black for - Functions: 1.Anti Short connection protection:Connect the red clip with the black clip when the power is on,No damage,no sparkle 2.Anti Over-discharge protection:Low voltage start,LED will flash at the frequency of 1HZ if the voltage is below 10.5V 3.Anti-reverse charge protection:After the car is started,Anti-reverse charge current is less than 1A 4.Anti Reverse polarity protection:Reverse connection with the Negative and positive end of the clamp and battery terminal,No damage, no sparkle 5.Anti High Temperature Start:When the temperature of the jump starter is higher than 80 Centigrade,the smart cable will prevent the current flow,to protect the jump starter Instruction: 1. Plug the cord of jumper cable into the jumper starter s socket . 2. Connect the red battery clamp of jumper cable to the vehicle s positive (+) battery and connect the black to the negative pole. 3. Start the vehicle when jumper cable indicator light turns green. Packing list : 1* clip A+ Battery Clip : Note: This link just for clip , without battery included ,hope you can understand ,thanks ! -------------------------------------------------------------------------------------------------------------------------------------------------------- LED Battery Clip : Note: This link just for one clip , without battery included ,hope you can understand ,thanks !