Fangrui Product Details 1. Car Engine Anti-theft Device 2. Free Installation Of Automatic Induction Relay, Installation Is Not Easy To Identify 3. No Need To Operate In Automatic Induction Mode, You Can Switch Between Manual Mode And Anti-robbing Mode 4. No Damage To The Car Line, Fast And Convenient Installation 5. After The Flame Is Turned Off, It Automatically Cut Off The Fuel, Close To The Vehicle And Automatically Open The Oil Path, The Sensing Distance Is About 15 Meters Anti-shielding And Anti-interference Technology, The Chip Is Stable. Only Suitable For 12v Gasoline Vehicles. Features: The Working Principle Of The Unit-relay: 1. Start The Engine For The First Time: The Unit Starts Scanning The Sensor Id Password, Which Matches Within 25 Seconds, The Car Can Be Driven Off Successfully. If Not Successful, The Fuel Circuit Be Cut Off After 25 Seconds, And The Engine Stop. 2. Start The Engine For The 2nd Time: The Unit Shortens The Scanning Time To 20 Seconds. 3. Start The Engine For The 3rd Time: The Unit Sho