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 ,LED will flash at the frequency of 1HZ if the voltage is 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 end of the clamp and battery terminal,No damage 5.Anti High Temperature :When the temperature of the jump is higher than 80 Centigrade,the smart cable will prevent the current flow,to the jump Instruction: 1.Connect the red and black battery clips to the and negative of car battery. 2.Insert plug of battery clips into outlet of power. 3.Turn auto key to shift to auto. 4.If the auto can not be started, turn the key after seconds until it is started successfully. 5.Afterwards, pull storage battery plug from power supply and remove clip from auto battery. Product Name: Relay Smart Clip Voltage: 12V Practical current: 500A, instantaneous current: 700A Cable length: length including head: 36CM red, 28CM black Suitable for: Low-displacement, high-displacement (1.5, 1.8, 2.0, 2.4, 2.5, 3.0, 3.5) displacement 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: 1 x clip Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.