1.Anti Short connection protection: the red clip with the black clip when the is on,No damage 2.Anti Over-discharge protection:Low voltage ,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 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 ,to the jump Instruction: 1. the red and black battery clips to the positive and negative of car battery. 2.Insert plug of battery clips into outlet of . 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 battery plug from 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 kickback 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 products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.