1.Anti Short connection protection:Connect the red clip with the black clip when the power is on,No damage 2.Anti Over-discharge protection:Low voltage start,LED 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 5.Anti High Temperature Start:When the temperature of the jump is higher than 80 Centigrade,the smart cable prevent the current flow,to protect the jump Instruction: 1.Connect the red and black battery clips to the positive and negative of car battery. 2.Insert plug of battery clips into start outlet of start power. 3.Turn auto key to start shift to start auto. 4.If the auto can not be started, turn the key after several seconds until it is started successfully. 5.Afterwards, pull storage battery plug from start power supply and remove clip from auto battery. Product Name: Relay Smart Clip Voltage: 12V Practical current: 500A, instantaneous current: 700A Cable length: total length including head: 36CM red, 28CM black Suitable for: Low-displacement, high-displacement cars (1.5, 1.8, 2.0, 2.4, 2.5, 3.0, 3.5) displacement cars Product features: Multi-function protection type: high voltage protection, low voltage protection, over current protection, low current protection, anti protection, anti reverse connection protection, high temperature protection, low temperature protection, short circuit protection, anti over discharge protection Colour:Photo Color Material:Plastic + Metal Package Contents: 2 x clip Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.