Support car model: Support for all models for - 1998-2010; support all models for 1995-2010; support for / new smart key. How to use Easy-Checker? for car model: Put Easy-Chcker on the EIS, put your IR key into EIS. Light on and not off, then EIS and key all ok Light on then off, then EIS ok,key not ok Light on and not off but car still can not start, please check Steering wheel lock and Key whether ok. Light not on,then EIS not ok. for Car model: EWS system: Put Easy-Checker on EWS(no need insert key) Light on means EWS ok(can used on:E46/E39/E53) Insert Easy-Checker into EWS(insert key in) Light on not off,then Key and EWS all ok Light on then off, then EWS ok, key not ok Light on and not off,but car still not start, please check whether key is ok CAS System( for 1 series/3 series/ 5 series/7 series) Put Easy-Checker directly on CAS and insert key in Light on and not off, then CAS and key all ok Liht on then off, then CAS OK but key not ok for / Car model: Smart Key slot-key Put Easy-Checker directly on the EZS and insert key in Light on and not off, then EZS and key ok Light on then off, then EZS ok,key not ok The color of the rope is random, and the random color cannot be . colour:red Material:plastic size:8cm Package Contents: 1 X Easy-Checker Only the above package content, other products are not included. Note: Light 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.