Fangrui Product Details 1. About Car Anti-theft Decoding Matching: If The Ecu Is Installed, It Can Not Be Started.firstly Check If The Car Is With Anti-theft Function Or Whether The Key Has A Chip.if Your Car Is With Anti-theft Function, It Is Necessary To Decode The Match (with The Decoder) Successfully, Then The Car Can Start Normally. 2. About Installation: Please Find A Professional Auto Repairman To Install, And Check The Line Voltage On The Vehicle Before Installation. When Installing, Plug In The Plug For Test Run, Make Sure There Is No Problem, And Then Fix The Screw. Note: Before Installing A New Product, Check And Find Out The Cause Of Broken Of The Previous Original Computer Board To Avoid Burning The Computer Board Again With The Same Fault. During Installation, Check Whether The Voltage And Circuit Are Normal And Whether The Grounding Is Good. The Normal Voltage Of The Computer Board Is 12v. Do Not Install When The Voltage Is Higher Than The Normal Voltage, Otherwise The Computer Board May Be Burned. Colour: Silve