1.The steering wheel key switch is not plug and play, please find a professional to install; 2.The cruise control switch requires the support of the cruise control module on the car; 3.The function of each side control button requires the support of the in-car DVD; 4.The control of DISP, trip,and other instruments requires the support of high-configuration instruments,and at the same time needs to connect to the instrument; 5.The order of the lines may be different in different regions and needs to be adjusted according to the old lines at the bottom of the clock spring; For K3 2014-2016 year For Cerato classic 2017 year For Ceed JD 2012-2014 year For Rio3 2014-2016 year ps: the year is only for reference, maybe different country have a little differance. 1.Please compare the shape with your car before making order,As we know, car versions have some different in different countries.please suitability carefully before purchase, thanks. 2.Installation Instruction is NOT included. Professional Installation Is Highly Recommend.If you have any questions, please contact customer service promptly. Thank you. 3.Please allow 1-2mm error due to manual measurement. 4.The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 5.To install this switch, it is required to have an Android system DVD on the vehicle. Otherwise, the button switch cannot be installed. Different batches, different angles and lighting, there are slight differences between the actual product and the picture, which not affect normal use Colour:Photo Color Material:Plastic Package Contents: 4x Button switch Only the above package content, other products are not included. Note: Light reflection 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.